Answers
The pH of the solution that is 0.10 M in acetic acid and 0.30 M in sodium acetate is approximately 5.23.
To calculate the pH of the solution, we need to consider the dissociation of acetic acid (CH3COOH) and the formation of acetate ions (CH3COO-) when sodium acetate (CH3COONa) is dissolved in water.
Acetic acid is a weak acid that partially dissociates in water. The equilibrium equation for the dissociation of acetic acid is as follows:
CH3COOH ⇌ CH3COO- + H+
The equilibrium constant for this reaction is known as the acid dissociation constant (Ka), which for acetic acid is approximately 1.8 x 10^-5 at 25 degrees Celsius.
Sodium acetate, being a salt, completely dissociates in water into acetate ions (CH3COO-) and sodium ions (Na+).
Since we have both acetic acid and acetate ions in the solution, we have a buffer system. In a buffer system, the pH can be calculated using the Henderson-Hasselbalch equation:
pH = pKa + log ([A-] / [HA])
Where pKa is the negative logarithm of the acid dissociation constant, [A-] is the concentration of the acetate ions, and [HA] is the concentration of the acetic acid.
Given that the acetic acid concentration is 0.10 M and the acetate ion concentration is 0.30 M, and the pKa of acetic acid is approximately 4.75, we can plug these values into the Henderson-Hasselbalch equation:
pH = 4.75 + log (0.30 / 0.10)
Calculating this expression, we find:
pH = 4.75 + log(3)
pH ≈ 4.75 + 0.48
pH ≈ 5.23
Therefore, the pH of the solution that is 0.10 M in acetic acid and 0.30 M in sodium acetate is approximately 5.23.
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Related Questions
When a substance breaks up into two simpler substances, the reaction
is an)
reaction.
Answers
Answer:
Decomposition.
Explanation:
Decomposition Reactions T hose reactions in which a single substance (reactant) splits up into two or more simpler substances (products) are known as decomposition reactions. These reactions are carried out by supplying energy in form of heat, electricity or light which breaks that substance into simpler substances
Using the two models, compare the processes of nuclear fusion and nuclear fission. What do the two processes have in common?
Choose all that apply.
A)
Energy is released.
B)
Elements are created
0)
A chain reaction occurs.
D)
Besides energy, neutrons are released.
E)
Both processes begin with an unstable nucleus.
Answers
Answer:it’s A and B
Explanation:
Answer:
A and B
Explanation:
They’re both fusion.
Chemistry (Chemical Bonding Test)
Which of the following molecules is non-polar?
Select one:
O a. HF
O b. NH3
O c. CH₂F2
O d. CF4
O e. HCN
Answers
Experiment 4: A chemist mixes aqueous solutions of sodium hydroxide and aluminum chloride in a double-displacement reaction, which forms a white solid precipitate and a clear solution. Write the complete, balanced molecular equation for the reaction. Include physical states.
balanced equation:
Answers
The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)
In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.
The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.
The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.
In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.
It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.
Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.
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5. What is the wavelength of a radio station emitting its signal at 95.5 MHz? Estimate your
answer to the nearest power of ten.
Answers
Answer:
\(\lambda=314\times 10^{-2}\ m\)
Explanation:
Given that,
Frequency, f = 95.5 MHz
We need to find the wavelength of a radio station emitting its signal.
The relation between the frequency and the wavelength is given by :
\(c=f\lambda\\\\\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{95.5\times 10^6}\\\\=3.14\ m\)
or
\(\lambda=314\times 10^{-2}\ m\)
So, the wavelength of a radio station is \(314\times 10^{-2}\ m\).
How many total ions are there in 5.00 moles of cobalt (II) bromide?
Answers
What are the advantages of using moringa in water purification?
Nonsense = report
Best answer = brainliest
Answers
Answer:
moringa tree has seeds that have unique properties towards water purification
Explanation:
the seeds of moringa tree have an extract which can separate unwanted particulates from the water sediment impurities.
they have the
anti-microbial treatment potentials
moringa also has various vitamins since it is a plant tissue
The events describe the formation of an underwater sedimentary rock. Place the events in chronological order.
Answers
The proper numbering is 4, 2, 1, and 3.
The following sequence of actions can be used to describe how an undersea sedimentary rock is formed.
Sedimentary Rock
In a basin, sediments and animal skeletons start to accumulate.
The material that has been deposited starts to become bound together by a glue ingredient brought in by running water, such as calcite or clay. The deposits start to become harder.
The deposits eventually transform into rock that is solid and hard. The new rock is a mixture of several organic and inorganic components.
Existing rocks become sediments as a result of weathering.
What causes sedimentary rocks to form?
Sedimentary rocks are formed when previously existing rocks or pieces of extinct animals accumulate on the surface of the Earth. Sediment that has been buried deeply becomes compacted
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The partial pressures of a mixture of gases are asfollows: oxygen, 210 mm Hg; nitrogen, 560 mm Hg;and carbon dioxide, 15 mm Hg. The total pressure ofthe gas mixture is 790 mm Hg. Is there another gaspresent in the mixture?
Answers
Partial pressure is the force which a gas exerts. The sum of the partial pressures in a mixture of all the gases equals the overall pressure.
The total pressure of the gas mixture is 790mm Hg.
If we sum all the partial pressures, we got:
Oxygen: 210mm Hg +
Nitrogen: 560 mm Hg +
Carbon Dioxide: 15 mm Hg
= 785 mmHg
As you can see, the sum of all the partial pressures is less than the total pressure. For this reason, there should be another gas present in the mixture whose partial pressure is 5 mm Hg, to make the total pressure be 790 mm Hg.
When [H+] = 4.0 × 10–9 M in water at 25°C, then
Kw =1.0×10–14.
b. pOH = 7.
c. [H3O+] = [OH–].
d. pH= 7
e. A-D are all correct
Answers
Answer:
a. Kw = 1.0 × 10⁻¹⁴
Explanation:
a. Let's consider the self-ionization of water.
2 H₂O(l) ⇄ H₃O⁺(aq) + OH⁻
The ion-product of water (Kw) at 25 °C is:
Kw = [H₃O⁺][OH⁻] = 1.0 × 10⁻¹⁴
c. Considering [H⁺] = [H₃O⁺] = 4.0 × 10⁻⁹ M, the concentration of OH⁻ is:
[OH⁻] = 1.0 × 10⁻¹⁴/[H₃O⁺] = 2.5 × 10⁻⁶ M
b. We can calculate the pOH using the following expression.
pOH = -log [OH⁻] = -log 2.5 × 10⁻⁶ = 5.6
d. We can calculate the pH using the following expression.
pH = -log [H⁺] = -log 4.0 × 10⁻⁹ = 8.4
When [H+] = 4.0 × 10–9 M in water at 25°C, then the \(Kw =1.0\times 10^-^1^4.\)
What is dissociation constant?
Kw is the dissociation constant or ionization constant of water.
The self-ionization of water will be
\(\rm 2 H_2O(l) = H_3O^+(aq) + OH^-\)
The dissociation constant of the water at 25°C will be
\(\rm Kw = [H_3O^+][OH^-] = 1.0 \times 10^-^1^4\)
Thus, the correct option is a. \(Kw =1.0\times 10^-^1^4.\)
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Lithium hydrogen phosphate formula
Answers
The formula for lithium hydrogen phosphate is Li2HPO4.
What is lithium hydrogen phosphate (Li2HPO4)?
Lithium hydrogen phosphate (Li2HPO4) is a chemical compound that contains the elements lithium, hydrogen, phosphorus, and oxygen. It is an ionic compound and a salt of phosphoric acid.
Lithium hydrogen phosphate is commonly used in the production of lithium-ion batteries and as a source of lithium ions in chemical reactions. It is also used in the synthesis of various other lithium compounds. In addition, lithium hydrogen phosphate has potential applications in the field of biomedical engineering as a material for bone tissue engineering and drug delivery.
What is an ionic compound?
An ionic compound is a type of chemical compound formed by the combination of positively charged ions (called cations) and negatively charged ions (called anions) through electrostatic attraction. The cations and anions are held together by ionic bonds, which are formed by the transfer of electrons from the cation to the anion. Ionic compounds are typically solids at room temperature and have high melting and boiling points. Examples of ionic compounds include sodium chloride (NaCl), magnesium oxide (MgO), and calcium carbonate (CaCO3).
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How do erosion and deposition work together to form sand dunes?
O Waves cause erosion along coastlines and deposit sand away from the shore,
Erosion occurs as surface water carries sediment and the sediment is deposited near oceans and lakes
O Glaciers cause erosion through the movement of large chunks of ice, which are deposited and form depressions
Erosion occurs through deflation, and sand that was picked up is deposited against an obstruction
Answers
Answer:
A
Explanation:
I took the test 100%, good luck
Erosion and deposition work together to form sand dunes as waves cause erosion along coastlines and deposit sand away from the shore. So the correct option is A.
What is erosion?Erosion is the removal of the material's surface from the crust of the Earth. It is mainly the debris of soil and rock. The eroded materials are transported by natural agents such as water or wind from the point of their removal.
The term erosion gives an explanation for the wearing down and molding of the landforms on the surface of Earth. This includes the rock weathering from its original position, the transport of this weathered material, and the erosion which is the result of the action of wind or glacial processes, etc.
The more appropriate term for this would be denudation or degradation. This includes processes of mass movement. This is a definition of erosion that is very narrow and excludes the process of the transport of eroded material by natural agencies.
Therefore, the correct option is A.
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What kind of wave causes particles in rocks to move at right angles to the direction of the wave
Answers
Answer:
Secondary waves
A type of seismic body wave in which rock particles vibrate at right angles to the direction of wave travel. Secondary waves cause the rocks they pass through to change in shape.
Diethylamine and HCl react to produce ________.
Answers
Answer:
diethylammonium chloride
Explanation:
In the given question, diethylamine and HCl react to produce diethylammonium chloride.
A reaction is a chemical process that includes the change of one or more substances into one or more different substances.
The reaction between dimethylamine and HCl produces dimethylammonium chloride. The chemical equation for the reaction is represented as:
\(\rm (CH_3)_2NH + HCl \rightarrow (CH_3)_2NH_2+ Cl^-\)
In this reaction, dimethylamine acts as a base and accepts a proton \(\rm (H^+)\) from HCl to form the salt, dimethylammonium chloride.
Therefore, diethylammonium chloride is formed when diethylamine and HCl reacts.
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A 5 kg ball is traveling at the same speed as a 10 kg ball. Compared to with 5 kg ball, the 10 kg ball has (2 points)
Answers
Answer: twice the momentum
Explanation:
what would be the short cut for Argon?
Answers
Answer:
Ag
Explanation:
I am not sure what you meant by shortcut, but that's the symbol
5. The Santa Ana winds, also known as "devil winds", are strong and dry high-pressure masses of air that begin in the Great Basin mountains and then affect coastal areas in Southern California. Assume that these winds consists of a mixture of nitrogen and oxygen gases that behave ideally and that they begin at a pressure and temperature of 0.705 atm of 22.0 0C, respectively, and that this mass of air is then adiabatically and reversibly compressed to a pressure of 1.00 atm when it descends to the coastal regions. Calculate the final temperature.
Answers
Answer:
Explanation:
Given that;
The initial pressure = 0.705 atm
The initial temperature = 22.0° C
The final pressure = 1.00 atm
The objective is to calculate the final temperature,
Since the change occurs adiabatically and reversibly, the final temperature can be calculated by using the thermodynamics equation:
\((\dfrac{T_2}{T_1})^r= (\dfrac{P_2}{P_1})^{r-1}\)
where;
r = 7/5 = 1.4
\((\dfrac{T_2}{22.0^0})^{1.4}= (\dfrac{1.00}{0.705})^{1.4-1}\)
\((\dfrac{T_2}{22.0^0})^{1.4}= (1.418)^{0.4}\)
\(T_2 = 22 \times 1.418 ^{^{\frac{0.4}{1.4}}\)
\(T_2 = 22 \times 1.418 ^{{0.286}\)
\(T_2 =24.31^0 \ C\)
What types of foundations are not good when building in an area that is likely to experience earthquakes?
soft clay
wet and sandy soil
hard clay
bedrock
Answers
Answer:
Wet and sandy soil as it does not provide a sturdy structure
In the Fischer esterification reaction, a carboxylic acid reacts with an excess of alcohol in acidic conditions to form an ester. During the reaction the sp2sp2 hybridized carbonyl carbon of the acid forms an sp3sp3 hybridized intermediate before returning to sp2sp2 hybridization in the product. Draw the structure of the neutral sp3sp3 hybridized intermediate and the ester product in the reaction between pentanoic acid and n‑propanol.
Answers
Answer:
See explanation and image attached
Explanation:
Esterification is a reaction of an alkanol and an alkanoic acid to yield an ester and water as products. It is analogous to inorganic neutralization reaction.
The process may be acid catalyzed. As mentioned in the question, the process of ester formation between pentanoic acid and n‑propanol first involves the carbonyl in going through an sp3 hybridized intermediate before returning to sp2 hybridized state in the product.
The image of the neutral form of this intermediate as well as the final structure of the ester are both shown in the image attached to this answer.
A solution composed of 30.6g NH3 in 81.3g of H20. Calculate the mole fraction for NH3 and H20
Answers
Answer:
0.286 moles
Explanation:
i hope this is helpful for you
Answer: NH3 = 9/5 H20= 9/2
Explanation:
Mr of NH3 = 17g/mol
Mr of H20 = 18g/mol
NH3 = 30.6g divide by 17g/mol = 1.8 mol
= 9/5
H20 = 81.3g divide by 18g/mol = 4.5 mol
= 9/2
how many oxygen atoms are there in six dinitrogen monoxide molecules? express your answer as an integer
Answers
Answer:
6 oxygen atoms
Explanation:
Step 1: Given data
Number of dinitrogen monoxide molecules (N₂O): 6
Number of oxygen atoms (O): ?
Step 2: Calculate the appropriate ratio
The ratio of dinitrogen monoxide molecules to oxygen atoms is 1:1.
Step 3: Use the ratio to calculate the number of oxygen atoms
6 molecule N₂O × (1 atom O/1 molecule N₂O): 6 atom O
(a) Is x-ray spectrography or optical emission spectrography more suitable for (1) trace analysis? Xray spee is more plicated spectra?
Answers
For trace analysis, X-ray spectrography is more suitable as it is more sensitive technique and gives finer emission spectrum.
What is emission spectrum?
Emission spectrum is defined as a spectrum of a chemical compound or substance composed of frequencies of electromagnetic radiation. Radiations which are emitted while electron make transition from higher to lower energy level.
Energy of photon is equal to the difference between the two energy states . There are many possible electronic transitions in an atom and every transition has a specific wavelength.
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The ability of a substance to dissolve in another is called
Answers
Answer: Solubility
Explanation:
Answer:
Solubility i believe
Explanation:
Which of the following best describes the interaction of the alkali metals with water? Select the correct answer below: A. They all dissolve easily in water. B. They do not react or dissolve in water. C. They react strongly with water to produce an alkaline solution and hydrogen. D. They react strongly with water to produce an alkaline solution and oxygen.
Answers
Answer:
C. They react strongly with water to produce an alkaline solution and hydrogen
Explanation:
All alkali metals react vigorously with cold water. In the reaction, hydrogen gas is given off and the metal hydroxide is produced.
Hope that helps.
What does an electroscope do?
It adds electrons to an object
It detects negative static electricity when protons are drawn down into the
leaves of an electroscope, causing the leaves to repel one another and move
apart.
It calculates the amount of electrons in an object therefore knowing what kind of
element something is
Electroscopes do not exist, they are a Hollywood Sci-Fi creation
Answers
Answer:
It detects negative static electricity when protons are drawn down into the
Explanation:
electroscope, instrument for detecting the presence of an electric charge or of ionizing radiation, usually consisting of a pair of thin gold leaves suspended from an electrical conductor that leads to the outside of an insulating container.
I need help putting these in order . Someone Please help me .
Answers
By lowering temperature from liquid to solid, atoms lose some of their energy, when atoms slow down, they move close together and make the matter denser.
How many moles of FeCl3 can
ba produced from
2.79.mol Cl?
2 Fe + 8 Clg -+ 2 FeCls
Answers
Answer:
2.79mol of FeCl3
solving:
formula to find given mol to b mol:
given a mol * b mol in reaction / a mol in reaction = answer
solving:
2.79mol * 2mol FeCl / 2mol Cl = 2.79mol FeCl3
Bauxite must go through two processes to produce aluminum metal. The yield of the Bayer process, which extracts aluminum oxide from bauxite, is 40 percent The yield of converting aluminum oxide to aluminum is 50 percent. Determine the yield in grams of aluminum from one cubic meter of bauxite ore.
Answers
The yield of aluminium obtained from 1 m^3 of bauxite is 419810 g
What is a Percent yieldA percent yield of a substance measures the amount of the substance actually obtained as a percentage ratio of expected yield.
Percent yield = actual yield / expected yield × 100%
How to calculate the mass of aluminium obtained from bauxiteFrom the data given:
40 % of the bauxite is converted to aluminium oxide.
Volume of bauxite = 1 m^3
40 % of 1 m^3 = 0.4 m^3
volume of aluminium oxide = 0.4 m^3
density of aluminium oxide = 3965 kg/m^3
Using mass = density × volumemass of aluminium oxide = 0.4 × 3965 kg
mass of aluminium oxide = 1586 kg
Formula of aluminium oxide is Al203
molar mass of aluminium oxide = 102 g
percentage mass of aluminium in one mole of aluminium oxide = mass of aluminium / mass of aluminium oxide × 100 %Percentage mass of aluminium in aluminium oxide = 54/102 × 100
Percentage mass of aluminium in aluminium oxide = 52.94 %
Expected mass of aluminium from aluminium oxide = 52.94 × 1586
Expected mass of aluminium = 839.62 kg
Actual yield = 40 % × 839.62
Actual yield of aluminium = 419.81 kg
mass of aluminium in grams = 419810 g
Therefore, mass of aluminium obtained from 1 m^3 of bauxite is 419810 g
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Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?
Answers
Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?When heat is added to ice at 0°C, the temperature of the ice does not change. This happens because all the heat energy is used up in overcoming the intermolecular forces of attraction (hydrogen bonds) that exist between the water molecules in ice.
As a result, the ice undergoes a phase change, from a solid to a liquid. This process is called melting. During melting, the temperature of the ice remains constant at 0°C because all the heat energy is used up in overcoming the intermolecular forces of attraction.The energy required to melt ice is known as the heat of fusion. The heat of fusion is the amount of heat energy required to change 1 kilogram of a solid into a liquid at its melting point. For water, the heat of fusion is 334 kJ/kg. This means that 334 kJ of heat energy is required to melt 1 kg of ice at 0°C. Therefore, during the melting of ice, the temperature of the ice does not change, but the internal energy of the ice does change, and this is manifested in the change of phase from a solid to a liquid.In summary, when heat is added to ice at 0°C, the temperature of the ice does not change, and all the heat energy is used up in overcoming the intermolecular forces of attraction between the water molecules in ice. This results in the melting of ice without any change in temperature.For such more question on molecules
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ILL GIVE BRAINLY PLEASE HELP!!! What type of transport across the cell (plasma) membrane requires energy?
active transport
bilayer
passive transport
concentration gradient
Answers
Active transport requires energy to transport the molecules across the cell membrane. Thus, Option A is correct.
Active transport is the transport of molecules from a lower concentration to a higher concentration across the cell (plasma) membrane. As this process is against the concentration gradient, it requires cellular energy to transport the molecules or ions. Active transport involves Primary active transport and secondary active transport.
Passive transport involves the movement of molecules from a higher to lower concentration gradient and thus does not require energy and is slower than active transport.
Therefore, only active transport requires energy for the transportation of molecules across the cell membrane.
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