The compositions of all phases present at 600°C, a 30% wt Al - 70% wt Si alloy consists of two phases: α-Al phase with approximately 10% wt Si and Si phase with approximately 2% wt Al.
To determine the phases present and their compositions, we need to consult the Al-Si phase diagram.
1. Locate the Al-Si phase diagram and find the 600°C isotherm line.
2. Identify the 30% wt Al - 70% wt Si composition point on the diagram and see where it intersects the 600°C isotherm line.
3. Determine the phases present at this intersection point.
4. Read the compositions of each phase from the phase boundaries around the intersection point.
From the Al-Si phase diagram at 600°C, the 30% wt Al - 70% wt Si alloy falls within the α-Al solid solution phase, which is primarily aluminum with dissolved silicon, and the Si phase, which is primarily silicon with dissolved aluminum.
For the α-Al phase composition, read the weight percentage of Si in α-Al from the phase boundary on the left side of the intersection point. This value is approximately 10% wt Si in α-Al.
For the Si phase composition, read the weight percentage of Al in Si from the phase boundary on the right side of the intersection point. This value is approximately 2% wt Al in Si.
In summary, at 600°C, a 30% wt Al - 70% wt Si alloy consists of two phases: α-Al phase with approximately 10% wt Si and Si phase with approximately 2% wt Al.
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In an experiment, mixing baking soda and vinegar produced a combination of salty liquid and carbon dioxide as shown in the following graph. What was the combined mass of the baking soda and vinegar before mixing?.
Based on law of conservation of mass, the mass of reactants used, vinegar and baking soda is equal tp the mass of the products formed.
What are the products of the reaction of vinegar and baking soda?Vinegar is a solution of a weak organic acid known as acetic acid.
The formula of acetic acid is CH3COOH
Baking soda is a substance whose chemical name is sodium hydrogen carbonate.
It is a weak base with the chemical formula NaHCO3.
The reaction between baking soda and vinegar produces carbon dioxide, water and the salt sodium acetate.
CH3COOH + NAHCO3 ---> CH3COONa + H2O + CO2
According to the law of conservation of mass, the mass of reactants used and products formed is constant.
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Answer:
55
Explanation:
i had the same test and 45+10 is 55
What is the period for the following elements? He ____________ Ge _____________ Rb ____________ Eu__________
Answer:
He= Helium
Ge= Germanium
Rb= Rubidium
Eu= Europium
Explanation:
i actually have no clue
Zn + 2HCl -> ZnCl2 + H2
Zn; 65.38 g/mol
A 3.79 L container can hold 0.15 moles H2 gas. What mass of Zn is required to generate 0.15 mol H2
Taking into account the reaction stoichiometry, the mass of Zn required to generate 0.15 mol of H₂ is 9.807 grams.
Reaction stoichiometryIn first place, the balanced reaction is:
Zn + 2 HCl → ZnCl₂ + H₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Zn: 1 moleHCl: 2 moles ZnCl₂: 1 moleH₂: 1 moleThe molar mass of the compounds is:
Zn: 65.38 g/moleHCl: 36.45 g/moleZnCl₂: 136.28 g/moleH₂: 2 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Zn: 1 mole ×65.38 g/mole= 65.38 gramsHCl: 2 moles ×36.45 g/mole= 72.9 gramsZnCl₂: 1 mole ×136.28 g/mole= 136.28 gramsH₂: 1 mole ×2 g/mole= 2 gramsMass of Zn requiredThe following rule of three can be applied: If by reaction stoichiometry 1 mole of H₂ is generated by 65.38 grams of Zn, 0.15 mole of H₂ is generated by how much mass of Zn?
mass of Zn= (0.15 mole of H₂× 65.38 grams of Zn)÷ 1 mole of H₂
mass of Zn= 9.807 grams
Finally, a mass of 9.807 grams of Zn are required.
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the functions of water cannot be understated. so - what are the functions of water? check all that apply!
Small molecules make up water. There are three of them: two hydrogen atoms and one oxygen atom. Hydrogen bonding is a force that holds water molecules together. It is the cause of water's extraordinary abilities.
Our bodies require water for the following reasons:
1. It soothes joints: In the spine's disks and in joints, cartilage contains about 80% water. Over time, dehydration can reduce the joints' ability to absorb damage, which can result in joint pain.
2.It produces mucous and saliva: Saliva helps in digestion and keeps the eyes, nose, and lips moist. Wear and tear are prevented in this way. Furthermore, drinking water maintains the mouth healthy. When substituted for sweetened beverages, it can also stop tooth decay.
3. It delivers oxygen throughout the body: Blood transports oxygen to various parts of the body and contains more than 90% water.
4. It protects delicate areas of the spinal cord and brain with padding: Brain anatomy and function can be impacted by dehydration. Additionally, it contributes to the synthesis of neurotransmitters and hormones. Long-term dehydration can cause issues with reasoning and thinking.
5. It controls the body's temperature: Perspiration is the result of the middle-layers of the skin's stored water being released when the body becomes hot. Evaporation causes the body to cool. in a sport. Some scientists claim that: Source of reality When the body doesn't have enough water, it can't handle heat stress as well, and it stores more heat. Lots of water consumption may help to reduce physical stress if heat stress occurs when exercising. Yet additional research is needed to fully understand these effects.
6. Water is necessary for the digestive system: The bowel need water to operate properly. Dehydration can lead to constipation, excessive stomach acid, and digestive problems. The likelihood of stomach ulcers and heartburn has increased as a result.
7. It keeps blood pressure stable: Lack of water can cause blood to become thicker. Enough water may reduce the likelihood of vasopressin release, which reduces the risk of high blood pressure, by keeping our cells and organs hydrated.
8. Water prevents kidney damage: The kidneys are in charge of body fluid. Water deficiency may result in kidney stones and other problems. Water is required by the bowel for proper operation. Dehydration can cause digestive problems such as constipation, excessive stomach acid, and more. As a result, it is now more probable to have heartburn and stomach ulcers.
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whats white sticky and best not to swallow?
Answer:
Bro its expired milk duh
Explanation:
What is the density of and object that is 100 grams and has a volume of 5 cubic centimeters?
J. 20 g/cm
K. 25 g/cm
L. 50 g/cm
M. 500 g/cm3
Explanation:
Density of object = gram/volume
= 100 g/ 5 cm³
= 20 g/cm³
The density of an object that is 100 grams and has a volume of 5 cubic centimeters is 20 g/cm³.
How do we calculate density?Density of any object will be calculated by using the below equation:
ρ = m/V, where
m = mass of object = 100g
V = volume of object = 5 cm³
On putting values we get,
ρ = 100/5 = 20 g/cm³
Hence required density is 20 g/cm³.
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identify and calculate the number of representative particles in 2.15 moles of gold.
Answer:
\(1.29 * 10^{24}\) particles of gold
Explanation:
To convert the number of moles of any substance, in this case gold, you need Avogadro's number.
Avogadro's number is always \(6.022\) × \(10^{23}\)
\(2.15\) moles Au × \(\frac{6.022*10^{23} particles}{1 mole Au}\) = \(1.29 * 10^{24}\) particles of gold
The number of representative particles in 2.15 moles of gold is 1.29 × 10 ²⁴.
What is mole ?The term mole is defined as the amount of substance containing 6.023 × 10²³ particles. 1 mol = 6.023 × 10²³ particles. This number is also called Avogadro's number. The symbol of mole is denoted by M.
A mole is a very important unit of measurement that chemists use. By using moles, chemists have to measure for very small things like atoms, molecules, or other particles.
The quantity amount of substance is a measure of how many elementary entities of a given substance are present in it.
To convert the number of moles of any substance, we required Avogadro's number.
Avogadro's number is always equal to 6.023 × 10 ²³
2.15 moles Au × 6.023 × 10 ²³ particles / 1 mole of Au
= 1.29 × 10 ²⁴ particles of gold
Thus, the number of representative particles in 2.15 moles of gold is 1.29 × 10 ²⁴.
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Hey I'm Chloe can you Help me, Thank you :)
How does photosynthesis use solar energy?
Answer:
Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water.
Explanation:
what is a polysaccharide? select the correct answer below: a polymer of monosaccharides linked by glycosidic bonds is known as a polysaccharide. a polysaccharide is formed by the hydrolyzation of glycosidic bonds with acid. polysaccharides are simple sugars, the most common of which is glucose. a polysaccharide is the sugar formed when two monosaccharides (simple sugars) are joined by glycosidic linkage.
A polymer of monosaccharides linked by glycosidic bonds is known as a polysaccharide.
What is a polysaccharide?We know that there are different kinds of sugars that we have. This would depend on the way that the atoms of the sugar are joined together. The various kinds of sugars are found to be;
Monosaccharides: These are composed of simple sugar units
Disaccharides: These are composed of two sugar units that are joined together.
Polysaccharides : These are composed of more than two sugar units that are joined together.
Now we have to note that in talking about poly saccharides the idea that they are sugars that are composed of many units have to be at the back of our minds in the discussion. The many units have to be joined by a kind of bond that is called the glycosidic bonds
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Which of the follow molecular configurations in polymers would generally not consist of any linear molecular chains? Selected Answer: Branched Answers: Crosslinked Network HCP Branched
Crosslinked network molecular configurations in polymers would generally not consist of any linear molecular chains. Therefore, option C is correct.
Crosslinked polymers are three-dimensional networks where polymer chains are connected to each other through covalent bonds, forming a mesh-like structure.
This crosslinking prevents the formation of linear molecular chains, as the chains are interconnected in a highly branched or networked fashion. Therefore, a crosslinked network configuration generally does not consist of any linear molecular chains.
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why is chemistry a thing
Answer:
It's a very good subject!
How many atoms are in 4.3 moles of lithium?
EZ POINTS!!
Which of the following is not a mixture? lemonade fruit salad pure water cereal and milk
Answer:
pure water that's easy hope that helps
at 70 oc, the solubility of an unknown solute is 61.8 g/100.0 g of water. what mass of the solute can dissolve in 142.1 g of water at the same temperature? type answer:
Answer:
Explanation:
Use the given solubility to set up a proportion:
61.8 g / 100.0 g water = x g / 142.1 g water
Cross-multiply to solve for x:
x = (61.8 g / 100.0 g water) * 142.1 g water
Simplify and solve:
x = 87.76 g
Round the answer to an appropriate number of significant figures:
The answer should be rounded to three significant figures, since the given solubility has three significant figures. Therefore, the final answer is:
x = 87.8 g
Therefore, 87.8 g of the unknown solute can dissolve in 142.1 g of water at 70 °C.
At 70°C, the solubility of the unknown solute is 61.8 g/100.0 g of water. 87.9 g of the solute can dissolve in 142.1 g of water at 70°C.
(61.8 g solute / 100.0 g water) = (x g solute / 142.1 g water)
To solve for x, cross-multiply:
61.8 * 142.1 = 100 * x
8791.38 = 100x
x = 87.9138
Thus, 87.9 g of the solute can dissolve in 142.1 g of water at 70°C.
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What type of soil has the finest of all the soil particles, measuring fewer than 0.002 millimeters in size?
Answer:
Clay soil
Explanation:
There are basically three types of soil namely: Sandy soil, clayey soil and loamy soil. Each of this soil type possess their own distinguishing characteristics. For example, on the basis of particle size and texture, CLAY SOIL possesses the smallest and finest particles.
Particles in a clay soil weighs lesser than 0.002 millimeters (mm) in size, making it have a high water holding or retention capacity.
Calculate the molality of 12 percent urea solution
Molality of a solution is defined as the number of moles of solute per kilogram of solvent. The formula for molality is given by the following equation:molality (m) = moles of solute / mass of solvent (in kg)In order to calculate the molality of a 12 percent urea solution, we need to first determine the mass of urea present in the solution.
We know that a 12 percent urea solution means that 12 grams of urea is present in 100 grams of the solution. Therefore, we can calculate the mass of urea in the solution as follows:Mass of urea = (12/100) x 200 g= 24 gNext, we need to convert this mass into moles. The molar mass of urea is 60.06 g/mol. Therefore, the number of moles of urea present in the solution can be calculated as follows:Number of moles of urea = Mass of urea / Molar mass of urea= 24 g / 60.06 g/mol= 0.3996 molFinally, we can use the formula for molality to calculate the molality of the solution as follows:molality (m) = moles of solute / mass of solvent (in kg)= 0.3996 mol / 0.2 kg= 1.998 mol/kgTherefore, the molality of the 12 percent urea solution is approximately 1.998 mol/kg.For such more question on moles
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What is it like on Mars? Please type 6 good answers.
a gas in a rigid container has a pressure of 632 torrs and a temperature of 45 celsius. The pressure has increased to 842 torrs. What is the new temperature of the gas
Answer:
Rigid container holds hydrogen gas at a pressure of 3.0 atmospheres and a temperature of 2 degrees Celsius. The pressure if the temperature is raised to 10 degrees Celsius will be 15 atmospheres based on the law of pressure for gas.Explanation:
A solution is made by dissolving 22 grams of sodium hydroxide in water. The sodium
hydroxide solution is then titrated against an unknown solution of oxalic acid. If it takes
14.9 mL of the acid to reach the end point, what is the concentration of the oxalic acid?
NaOH + H₂C₂O → H₂O + Na₂C₂O₁
To find the concentration of the unknown oxalic acid solution, we need to use the balanced chemical equation for the reaction:NaOH + H₂C₂O → H₂O + Na₂C₂O₁
From the equation, we can see that the mole ratio between sodium hydroxide (NaOH) and oxalic acid (H₂C₂O) is 1:1. First, we need to determine the number of moles of NaOH used in the titration. The molar mass of NaOH is 22.99 + 16.00 + 1.01 = 40.00 g/mol. Therefore, the number of moles of NaOH is:moles of NaOH = mass of NaOH / molar mass of NaOH
= 22 g / 40 g/mol
= 0.55 mol
Since the mole ratio between NaOH and H₂C₂O is 1:1, the number of moles of H₂C₂O is also 0.55 mol.Now, we can determine the concentration of the oxalic acid solution using the volume of the acid used in the titration. The volume is given as 14.9 mL, which is equivalent to 0.0149 L. concentration of oxalic acid (C) = moles of H₂C₂O / volume of H₂C₂O
= 0.55 mol / 0.0149 L
≈ 36.91 mol/L.Therefore, the concentration of the unknown oxalic acid solution is approximately 36.91 mol/L.
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Please people help WHAT IS THE ANSWER? NO LINKS PLEASE
to what reaction does the solubility product constant, ksp, refer? table 16.1 lists ksp values for several ionic solids. for any of these ionic compounds, you should be able to calculate the solubility. what is the solubility of a salt, and what procedures do you follow to calculate the solubility of a salt? how would you calculate the ksp value for a salt given the solubility
The solubility product constant (Ksp) is a measure of the equilibrium of a salt in an aqueous solution.
What is solubility?Solubility is the ability of a substance to dissolve in a given solvent. It is a measure of the maximum amount of a solute that can be dissolved in a solvent.
It is used to determine the solubility of an ionic solid in a given solution. Ksp is the product of the concentrations of the ions in the solution at the equilibrium state.
Table 16.1 lists Ksp values for several ionic solids. The solubility of a salt is the amount of the salt that can be dissolved in a given amount of water or other solvent. To calculate the solubility of a salt, one must first determine the Ksp value for that salt. Then, the amount of the salt that will dissolve in a given amount of solvent can be calculated from the Ksp value.
To calculate the Ksp value for a salt given the solubility, one must first calculate the concentrations of the ions in the solution. This can be done by dividing the solubility of the salt by the total volume of the solution. Once the concentrations of the ions in the solution are known, the Ksp value can be determined by taking the product of these concentrations.
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what is the diference between weather. and climate
Answer:Whereas weather refers to short-term changes in the atmosphere, climate describes what the weather is like over a long period of time in a specific area. Different regions can have different climates. ... Weather tells you what to wear each day. Climate tells you what types of clothes to have in your closet.
Explanation:well bc i am in 10th grade this kinda easy lol hoped i helped
Answer:
Explanation:
Weather is the current state of weather while, climate is the most common weather of that region over a time of 30 years.
19.049 of ammonia gas were mixed with 31.109 of hydrogen chloride gas in a closed container (i) which of the reactants was in excess and by how much (ii) how much ammonium chloride was formed? (iii) how much more of the insufficient reactant would be needed to completely react with the excess of the other reactant?(N=14, H=1, Cl=35.5).
pls I need answer ASAP
What is Stoichiometry?
In chemical equations, unless stated otherwise, the reactants and products will theoretically always remain in stoichiometric ratios.
The stoichiometry of a reaction is the relationship between the relative quantities of products and reactants, typically a ratio of whole integers.
Consider the following chemical reaction: aA + bB ⇒ cC + dD.
The stoichiometry of reactants to products in this reaction is the ratio of the coefficients of each species: a : b : c : d.
Now let's apply this knowledge to the question to be attempted:
first, we can start by writing out a balanced chemical equation, with states.
NH₃(g) + HCl(g) ⇒ NH₄Cl(s). This is an example of an acid/base decomposition reaction.
Hence, the stoichiometry of this reaction is 1 : 1 : 1
Now we can calculate the number of moles of each reactant that we have, by dividing the mass present (g; symbol = m), by the molar mass (g/m; symbol = M).
n(NH₃) = m/M = 19.049/(14.01+3×1.008) = 1.118 moln(HCl) = m/M = 31.109/(1.008+35.45) = 0.8533 molNext, we need to determine if, in the reaction, the substances ARE present in stoichiometric ratios. If they are not, then we need to identify the limiting reagent (the reactant which reacts completely), and the excess reagent (the reactant which is not completely used up). We can do this by inputting the mole values in the question into the ratios, until we figure out which doesn't match up.
Limiting reagent = HCl; Excess reagent = NH₃
[note: in this situation, the stoichiometry is 1 : 1, so it's very easy to determine the limiting reagent)
(i) which of the reactants was in excess and by how much
NH₃ is in excess of 0.2647 mol
(ii) how much ammonium chloride was formed?
Now we use the limiting reagent, HCl, to calculate moles of NH₄Cl formed, using our stoichiometric ratios.
Moles of NH₄Cl = moles of HCl = 0.8533 mol
(iii) how much more of the insufficient reactant would be needed to completely react with the excess of the other reactant?
Since we use our stoichiometric ratios, if NH₃ is limiting reagent, then we require 0.2647 extra mol of HCl to react.
Determine the equilibrium constant Kc and the reaction quotient Qc for a reversible reaction.
Answer:
Explanation:
The equilibrium constant (Kc) is a measure of the relative concentrations of the reactants and products at equilibrium for a given chemical reaction. It is defined as the ratio of the product concentrations raised to their stoichiometric coefficients, to the reactant concentrations raised to their stoichiometric coefficients. For a general reversible reaction
aA + bB <=> cC + dD
The equilibrium constant is defined as:
Kc = [C]^c [D]^d / [A]^a [B]^b
where [X] represents the concentration of species X (in molarity units), and the superscripts on the concentrations represent the stoichiometric coefficients of the species in the balanced equation for the reaction.
The reaction quotient (Qc) is similar to the equilibrium constant, but it is calculated using the concentrations of the reactants and products at a given point in time, rather than at equilibrium. The reaction quotient is also defined as the ratio of the product concentrations raised to their stoichiometric coefficients, to the reactant concentrations raised to their stoichiometric coefficients, and is calculated using the same equation as Kc, but with the concentrations at a specific point in time, rather than at equilibrium.
Qc = [C]^c [D]^d / [A]^a [B]^b
It can be used to predict the direction of reaction depending on the sign of Qc, Kc.
If Qc < Kc, the reaction will shift in the direction of products.
If Qc > Kc, the reaction will shift in the direction of reactants
If Qc = Kc, the reaction is at equilibrium.
If you want to know more about equilibrium reaction you can check on Le Chatelier's principle.
1. What atoms make up a molecule of acetic acid? *
O carbon, sodium, oxygen
sodium, hydrogen, carbon
carbon, hydrogen, oxgyen
sodium, hydrogen, oxgyen
Answer:
carbon,hydrogen and oxygen
molecular formula=CH3COOH
A solution prepared by dissolving 25.8 mg of benzene (78.11 g/mol) in hexane (86.16 g/mol) and diluting to 250 ml had an absorption peak at 256 nm and an absorbance of 0.266 in a 1.000-cm cell. what is the percent transmittance?
The percent transmittance can be calculated using the formula % Transmittance = (10^(-Absorbance)) x 100% In this case, the absorbance is given as 0.266, so plugging that into the formula we get ,% Transmittance = (10^(-0.266)) x 100% % Transmittance = 62.7% .
As for an explanation, percent transmittance is a measure of how much light passes through a sample compared to the amount that passes through a blank or reference solution. It is calculated by dividing the amount of light that passes through the sample by the amount that passes through the reference solution and multiplying by 100%. In this case, we are given the absorbance of the sample solution, which is a measure of how much light the solution absorbs at a particular wavelength (256 nm in this case). The percent transmittance is then calculated using the formula I provided earlier.
The absorbance (A) is 0.266. We can rearrange the equation above to solve for %T ,%T = 100 * 10^(-A) , Substitute the given absorbance value into the equation: %T = 100 * 10^(-0.266) Now, calculate the percent transmittance ,%T ≈ 45.05
So, the percent transmittance is approximately 45.05%.
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The speed limit on a certain highway is 72 km/h. what is the speed in cm/s?
Answer:
7.2e+6 cm (7200000cm)
Explanation:
Hope this is the answer your looking for ;)
Flaked soybeans are to be leached with hexane to remove the soybean oil in a continuous countercurrent stagewise operation. Experiments show that the flakes retain solution to an extent depending upon the oil content of the solution as follows:
Kg oil/kg solution retained 0 0.20 0.30
Kg sol'n retained/kg insoluble solid 0.58 0.66 0.70
The soybean flakes enter containing 20% oil (and no hexane) and are to be leached to 0.5% oil (on a solvent-free basis). The solvent is fed at 1.0 kg fresh solvent per kilogram flakes (including oil), and the fresh solvent is free of oil. How many stages are required? State all of your assumptions clearly. Determine graphically and using Excel.
The extent to which flaked soybeans retain solution during hexane leaching generally decreases with increasing oil content.
This is because soybean oil acts as a solvent for the soybean solids, reducing their affinity for hexane. In other words, the more oil that is present in the flakes, the less likely they are to retain hexane solution.
However, the relationship between oil content and retention can also be influenced by other factors such as temperature, agitation rate, and leaching time. Therefore, it is important to optimize the leaching conditions to achieve the desired level of oil removal while minimizing losses of soybean solids.
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--The complete Question is, In the leaching of flaked soybeans with hexane to remove soybean oil, how does the extent to which the flakes retain solution change with increasing oil content?--
in a titration, 14.5cm3 of nitric acid, HNO3 neutralised exactly 25cm3 of 0.05 mol/dm3 sodium hydroxide, NaOH
calculate the concentration of the nitric acid solution in mol/dm3
Calculate the concentration of the nitric acid in g/dm3
The concentration of the nitric acid solution is 0.0862 mol/\(dm^3\) and the concentration of the nitric acid in g/\(dm^3\) is 5.431 g/\(dm^3\).
What is titration?
A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution.
According to the neutralization law,
\(n_1M_1V_1 = n_2M_2V_2\)
\(n_1\)is the basicity of \(HNO_3\) =1
\(M_1\) is the molarity of \(HNO_3\) =0.05 mol/\(dm^3\)
\(V_1\) is the volume of \(HNO_3\) solution = 25\(cm^3\)
\(n_2\) is the acidity of NaOH =1
\(M_2\) is the molarity of NaOH =?
\(V_2\) is the volume of NaOH solution =14.5\(cm^3\)
Putting in the values we get:
\(n_1M_1V_1 = n_2M_2V_2\)
1 x 0.05 mol/\(dm^3\) x 25cm^3 = 1 x \(M_2\) x 14.5\(cm^3\)
\(M_2\) = 0.0862 mol/\(dm^3\)
Hence. the concentration of the nitric acid solution in 0.0862 mol/\(dm^3\) and the concentration of the nitric acid in g/dm3 is 0.0862 x63.01 g/\(dm^3\)= 5.431 g/\(dm^3\).
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