if 15.00 ml of a monoprotic weak acid was titrated with 0.250 m naoh, and it was determined that 35.20 ml of naoh was used to reach the equivalence point, what is the concentration of the acid
Answers
The weak acid has a concentration of 0.5867 mol/L.
In order to calculate the concentration of the weak acid, we need to use the equation for the neutralization reaction between the weak acid and the strong base:
\(HA\) + \(NaOH\) → \(NaA\) + \(H_2O\)
Where \(HA\) is the weak acid, \(NaOH\) is the strong base, \(NaA\) is the salt of the weak acid and \(H_2O\) is water.
First, we need to calculate the number of moles of \(NaOH\) used in the titration:
n(\(NaOH\)) = c(\(NaOH\)) x V(\(NaOH\))
n(\(NaOH\)) = 0.250 mol/L x 0.03520 L
n(\(NaOH\)) = 0.0088 mol
Since the weak acid is monoprotic, the number of moles of \(NaOH\) used is equal to the number of moles of \(HA\) present in the original solution. Therefore, we can calculate the concentration of the acid using the following equation:
c(\(HA\)) = n(\(HA\)) / V(\(HA\))
n(\(HA\)) = n(\(NaOH\))
n(\(HA\)) = 0.0088 mol
V(\(HA\)) = 15.00 mL / 1000 mL/L
V(\(HA\)) = 0.01500 L
c(\(HA\)) = 0.0088 mol / 0.01500 L
c(\(HA\)) = 0.5867 mol/L
Therefore, the concentration of the weak acid is 0.5867 mol/L.
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Related Questions
if you were going to be handling harmful chemicals in a lab, what safety equipment would you use to protect your eyes and face?(1 point)
Answers
Chemical splash goggles or face shields should be worn when there is a risk of splashing hazardous materials or flying particles.
What are safety equipment would you use to protect eyes and face ?Put on this protective gear before dealing with hazardous chemicals in a lab to protect your face and eyes.
If a substance has the ability to damage a surface upon touch, it is corrosive. People who inhale the fumes from these substances run the risk of burning their eyes, skin, and internal organs.These chemical burns can be avoided by closely following the biosafety protocol that a laboratory requires the use of masks, goggles, gloves, and an apron or lab coat.The regulations for biosafety in a lab necessitate that the subject not possess the exposed skin and eyes.Learn more about Lab safety here:
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4. Calculate the molar mass of a mole of iodine, I2. Round to 2 decimal places.
Answers
The molar mass of I2 : 283.81 g/mol
Further explanationGiven
I2 compound
Required
The molar mass
Solution
Relative atomic mass (Ar) of element : the average atomic mass of its isotopes
Relative molecular weight (M) : The sum of the relative atomic mass of Ar
M AxBy = (x.Ar A + y. Ar B)
So for I2 :
= 2 x Ar I
= 2 x 126.90447 g/mol
= 253. 809 g/mol
= 253.81 g/mol
When a substance changes from a solid to a liquid, is a new substance made?
Answers
Answer:
no
Explanation:
it means melting or fusion so yhe answer is no
A substance changes from a solid to a liquid no its is not the formation of new substance. It is the change of state of the matter.
What are the states of matter?The states of matter can be defined as one of the several configurations in which matter can exist.
There are basically three states of matter.
Solid - It is defined as hard, distinct in volume and shape. Atoms and molecules are joined together to form solids.Liquid - It is defined as defined volume with the ability to flow and change shape. Atoms and molecules are only weakly bound together in liquids.Gases - It is defined as no clear shape or volume.Thus, a substance changes from a solid to a liquid no its is not the formation of new substance. It is the change of state of the matter.
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CORRECT ANSWER GETS BRAINLIST
Answers
Answer:
C.) Temperature inversion
Explanation:
A temperature inversion occurs when cool air becomes trapped underneath a layer of warm air.
_____ energy has the total amount of
kinetic energy contained in all the
particles of a substance.
A: Thermal
B: Sound
C: Chemical
D: Electric
Answers
Answer: Thermal Energy
Explanation:
liquid nitrogen is generally held at a temperature of 77 k. a) liquid nitrogen is generally held at a temperature of °ra. b) liquid nitrogen is generally held at a temperature of °f. c) liquid nitrogen is generally held at a temperature of
Answers
The temperature of liquid nitrogen (LN), an inert cryogenic fluid, is 196 °C (320 °F). To drop the temperature of the concrete as much as is possible without causing it to freeze, LN is directly injected by lances into the batch water storage tank, the aggregate, or the mixer.
What is Cryopreservation ?Cryopreservation is the process of preserving live cells, tissues, and other biological samples by placing them in a deep freezer at extremely low temperatures. The sample is typically stored at 196°C or lower. All of a cell's biological processes come to an end at such low temperatures, and the cell dies.
Cells and tissues intended for transplantation are frequently stored via cryopreservation. A extremely stable ultra-low temperature environment is provided by liquid nitrogen. It is therefore employed for long-term storage.Learn more about Cryopreservation here:
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How many grams of oxygen, at standard conditions,
are needed to react with 90 grams of glucose,
(C6H12O6)?
Postpone
C6H1206+ 602 6CO₂+ 6H₂O
2
grams
SUBMIT
Answers
In ideal conditions, 90 grams of glucose require 95.92 grammes of oxygen to react.
How many grams of oxygen are needed to oxidise 180 grammes of glucose?This tells us that 1 molecule of glucose must be oxidised by 6 molecules of oxygen (O2) (C6H12O6). Hence, 1 mole of glucose requires the oxidation of 6 moles of oxygen. Hence, 180 grams of glucose require 6 x 32 = 192 grams of oxygen to be oxidised.
Applying the balanced chemical equation
C6H12O6 + 6O2 -> 6CO2 + 6H2O
First, we need to calculate the number of moles of glucose in 90 grams:
Number of moles of glucose = mass / molar mass
Number of moles of glucose = 90 g / 180.16 g/mol (molar mass of C6H12O6)
Number of moles of glucose = 0.4996 mol
Then, we may determine how many moles of oxygen are needed by using the mole ratio between glucose and oxygen:
Number of moles of oxygen = 6 x number of moles of glucose
Number of moles of oxygen = 6 x 0.4996 mol
Number of moles of oxygen = 2.9976 mol
Lastly, we may convert the amount of moles to grammes using the molar mass of oxygen:
Mass of oxygen = number of moles x molar mass
Mass of oxygen = 2.9976 mol x 32.00 g/mol (molar mass of O2)
Mass of oxygen = 95.92 g
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COPY out the following sentences and fill in the gaps.
1. Sulfuric acid releases _____________ ions in solution. This makes the solution _______________________.
2. Sodium hydroxide is an ___________________. It releases ____________________ ions in solution. This makes the solution __________________________.
3. Write word and symbol equations for both of the above situations, a template is given below.
Sulfuric acid --> _____________ + ___________________
________ --> ___________ + ______________
Sodium hydroxide --> _____________________ + ___________________
______________ --> ______________ + __________________
Answers
Answer:
1. Hydrogen ions; acidic
2. Alkali; hydroxide ions; alkaline
3a. Sulfuric acid --> 2 Hydrogen ions + sulfate ion
H₂SO₄ --> 2H+ + SO₄²-
3b. Sodium hydroxide --> Sodium ion + Hydroxide ion
NaOH --> Na+ + OH-
Explanation:
1. Sulfuric acid releases hydrogen ions in solution. This makes the solution acidic.
Acids produce hydrogen ions when dissolved in aqueous solutions.
2. Sodium hydroxide is an alkali. It releases hydroxide ions in solution. This makes the solution alkaline.
Alkalis are soluble bases that produce hydroxide ions in solution.
3a. Sulfuric acid --> 2 Hydrogen ions + sulfate ions
H₂SO₄ --> 2H+ + SO₄²-
The equation above is for the ionization of sulfuric acid
b. Sodium hydroxide --> Sodium ion + Hydroxide ion
NaOH --> Na+ + OH-
The equation above is for the ionization of sodium hydroxide
You have 2.7 moles of carbon. How many atoms do you have?
Answers
Answer:
1.63 × 10²⁴ atoms.
Explanation:
To calculate the number of atoms (N) contained in 2.7moles of carbon, we multiply the number of moles (n) by Avogadro's number (6.02 × 10²³).
That is, N = n × nA
Where;
N = number of atoms
n = number of moles (mol)
nA = Avogadro's numbe
N = 2.7 × 6.02 × 10²³
N = 16.254 × 10²³
N = 1.63 × 10²⁴ atoms.
Hence, there are 1.63 × 10²⁴ atoms in 2.7moles of Carbon.
What is the function of a backbone invertebrates
Answers
Backbone provide support to the body. It provides strength to the body.Spinal cord is enclosed by backbone.
The spinal cord is defined as a long, tube-like band of tissue. It connects brain to lower back. Spinal cord carries nerve signals from brain to body and vice versa. These nerve signals help feel sensations and move the body.
Spinal cord’s main purpose is to conduct nerve signals throughout body. These nerve messages have three main functions. They are as follows:
Control body movements and functions.Report senses to brain. Signals from other parts of body help brain record and process sensations like pressure or pain.
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8. What is the name of this compound?
CH3
CH3-C-Br
CH₃
sec-butyl bromide
tert-butyl bromide
isopropyl bromide
isobutyl bromide
Answers
Answer:
tert-butyl bromide
Explanation:
sec-butyl bromide
CH3 -CH-CH2-CH3
Br
tert-butyl bromide
CH3
CH3-C- Br
CH3
isopropyl bromide
CH3
CH3-CH-Br
isobutyl bromide
CH3
CH3-CH-CH2-Br
A beaker contains dissolved NH4Cl, and another beaker contains dissolved Pb(NO3)2. When the two solutions are mixed together, a precipitate forms. What are the spectator ions
Answers
Answer:
Explanation:
The reaction of precipitation between NH₄Cl and Pb(NO₃)₂ is the following:
2NH₄Cl(aq) + Pb(NO₃)₂ → NH₄NO₃(aq) + PbCl₂(s)
The formed precipitate is PbCl₂ because it is an insoluble salt. The following ionic equation shows the spectator ions:
2NH₄⁺(aq) + 2Cl⁻(aq) + Pb²⁺(aq) + 2 NO₃⁻(aq) → 2NH₄⁺(aq) + 2NO₃⁻(aq) + PbCl₂(s)
The precipitate (PbCl₂) is formed by the Pb²⁺ ion and the Cl⁻ ion. Thus, the spectator ions are those which do not form the precipitate. In this case, they are: NH₄⁺ (ammonium ion) and NO₃⁻ (nitrate ion).
The fermentation of C6H12O6 will produce carbon dioxide and
Answers
Answer:
ethanol
Explanation:
CO2 is carbon dioxide
C2H5OH is ethanol and we know that because that is what is left after taking out the CO2
In Bohr’s model of the atom, where are the electrons and protons located?
Answers
The structures of four organic compounds are shown below. Which statement is not correct?
A. Only one of the compounds is an alcohol.
B. Only one of the compounds is an alkane .
C. Only one of the compounds is unsaturated
D. Only three of the compounds are hydrocarbons.
Answers
Answer:
Option B. Only one of the compounds is an alkane
Explanation:
To know which option is wrong us, we simply determine the class to which each diagram belongs.
Diagram 1:
CH4 is called methane and it is a member of the alkane series which are saturated hydrocarbon.
Diagram 2:
CH3CH3 is called ethane and it is a member of the alkane series which are saturated hydrocarbon.
Diameter 3:
CH2=CH2 is called ethene and it is a member alkene series which are unsaturated hydrocarbon.
Diagram 4:
CH3CH2OH is called ethanol which is a member of the alcohol family. CH3CH2OH is also a saturated alcohol as it only contains single bonds.
From the above, we can see that:
1. Only one compound is alcohol i.e CH3CH2OH.
2. There are two members of the alkane series i.e CH4 and CH3CH3.
3. Only one compound is unsaturated i.e CH2=CH2. Unsaturated compound has one or more double bond.
4. Only three compounds are hydrocarbon i.e CH4, CH3CH3 and CH2=CH2. Hydrocarbons are compounds containg only carbon and hydrogen.
Therefore, option B is wrong as there are two members of the alkane present.
the energy of an electron in a multielectron atom is determined by
Answers
Answer:
by principal quantum number (n) and azimuthal quantum number (l)
Explanation:
I used the web to answer so I'm not sure if this is right
Help Plzzzzzz!!!!!!!
What is the difference between magma and lava?
A Magma is molten rock within the earth; lava is molten rock on the earth's surface.
B Magma is cool, lava is very hot.
Magma is very hot, lava is cool.
D Magma is molten rock on the earth's surface; lava is molten rock within the earth.
Answers
Answer:
A
Explanation:
your welcome have a great day.
Given that there are more possible combinations for amino acids than amino acids themselves, what does this imply about the number of codes for each amino acid?
Answers
The fact that there are more possible combinations for amino acids than the number of amino acids themselves implies that each amino acid can be encoded by multiple codons.
A codon is a sequence of three nucleotides in DNA or RNA that corresponds to a specific amino acid.
There are 20 standard amino acids used to build proteins in living organisms. However, there are 64 possible three-letter combinations of nucleotides (4³) that can be used to form codons. This means that on average, there are more than three codons that can encode each amino acid.
To calculate the number of codons per amino acid on average, we divide the total number of codons (64) by the number of amino acids (20). Therefore, the average number of codons per amino acid is 64/20 = 3.2.
This indicates that there is a degeneracy or redundancy in the genetic code, where multiple codons can specify the same amino acid.
For example, the amino acid leucine is encoded by six different codons (UUA, UUG, CUU, CUC, CUA, CUG), while methionine and tryptophan are each encoded by a single codon.
In conclusion, the existence of more possible combinations for amino acids than amino acids themselves means that the genetic code is degenerate, allowing for redundancy and flexibility in protein synthesis.
This redundancy helps to protect against errors in DNA replication and transcription and allows for evolution to occur through the accumulation of genetic variations.
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4. In aliens, skin color is a codominant trait. What skin color will the offspring of the following parents have?
Parent 1
Parent 2
Nest
А
B
C
O A Skin color A (pink)
O B. Skin color Byblue)
O C. Skin color (pink with blue spots)
O D. Skin color D (green)
Answers
Explanation:
Do you think the water in the glass contains Carbon and why
Answers
Yes i think that a glass of water contains carbon because , carbon dioxide diffuses into water . The amount of carbon dioxide in the glass of water and the amount of carbon dioxide in the atmosphere are precisely proportional .
The carbon dioxide that almost all natural waters contain is obtained in a variety of ways . Some of this gas is absorbed by rain as it falls through the air. Rainwater that has been somewhat acidic on its journey to the earth will brings more carbon dioxide if it passes through decomposing plants . Although in considerably lesser amounts than in carbonated beverages , carbon dioxide gas can also be found in a glass of water .
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A 3.00 L sample of paint that has a density of 4.65 g/mL is found to contain 33.1 g lead (II) nitride. Determine (A) how many grams of lead ion are in the paint sample? (B) How many ions of lead are in the paint? (C) what is mass percentage of lead in the paint/ What is the ppm?
Answers
1) Grams of lead.
Convert grams of lead (II) nitride to moles of lead (II) nitride
\(molofPb_3N_2=33.1gPb_3N_2\cdot\frac{1molPb_3N_2}{649.61gPb_3N_2}=0.0509lofPb_3N_2\)Convert moles of lead (II) nitride into moles of Pb
\(\text{molesofPb}=0.0509molPb_3N_2\cdot\frac{3\text{molPb}}{1molPb_3N_2}=0.1527\text{molPb}\)Convert moles of Pb into grams of Pb
\(\text{gofPb}=0.1527\text{molPb}\cdot\frac{207.2\text{ g Pb}}{1\text{molPb}}=31.64\text{ g Pb}\)There is 31.64 g of ions of lead in the sample of paint.
Need help with answers 1-5?
Answers
When atoms share electrons to gain the _________ configuration of a noble gas, the bonds formed are _____________.
(covalent, unshared pairs, shared, stable electron, single)
Answers
When atoms share electrons to gain the stable electron configuration of a noble gas, the bonds formed are covalent.
Covalent bonds occur when two atoms share one or more pairs of electrons in order to achieve a full outermost energy level, which is the same as that of a noble gas. This sharing of electrons allows both atoms to attain a stable configuration and become more chemically stable.
Covalent bonds can be single, double, or triple depending on the number of electrons shared between the atoms. The electrons that are shared in a covalent bond are referred to as shared pairs. The presence of unshared pairs of electrons in a molecule can affect its chemical properties and reactivity. Covalent bonds are the most common type of chemical bond and are found in a wide variety of molecules, including water, carbon dioxide, and many organic molecules.
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If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume is
decreased to 20.0 mL?
Which equation should you use?
V1 V2
T1 T2
P1V1 = P2V2
V1 V₂
N1 N2
Answers
Answer: P1V1 + P2V2
Explanation:
what is the molar mass of ag
Answers
Answer:
107.8682U is the molar mass of ag
the quantity of groundwater that can be stored within sedimentary material is most directly controlled by which of the following parameters? view available hint(s)for part a the quantity of groundwater that can be stored within sedimentary material is most directly controlled by which of the following parameters? the porosity of the material the composition of the sediment the capillary fringe the permeability of the material the location of the water table
Answers
The quantity of groundwater that can be stored within sedimentary material is most directly controlled by the porosity of the material. The porosity of the material is the parameter that most directly controls the quantity of groundwater that can be stored within sedimentary material.
Porosity refers to the amount of empty space or voids within the sediment, which can hold and store water. Sedimentary rocks, such as sandstones and conglomerates, generally have higher porosity compared to other rock types like igneous or metamorphic rocks.
Porosity is influenced by various factors. Grain size plays a significant role, as sediments with larger grains have higher porosity due to the larger spaces between particles. Sorting, which refers to the uniformity of grain sizes, also affects porosity. Well-sorted sediments have higher porosity than poorly sorted ones. Compaction of sediments due to pressure over time reduces porosity, while cementation of particles can further decrease porosity by filling in pore spaces.
Higher porosity means there is more space available to store groundwater within the sedimentary material. This stored groundwater can be accessed through wells or extracted from aquifers. It is important to note that the movement and availability of groundwater are also influenced by permeability, which refers to the ability of the material to transmit water. While porosity determines the potential storage capacity, permeability controls the flow and accessibility of groundwater within the sediment.
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What is the difference between Eukaryote and Prokaryote cells?
Answers
pls make me brainliest
The reaction nC2H4 + (-C2H4-)n is
an
example of
1.
saponification
2.
esterification
3.
polymerization
4.
fermentation
Answers
Answer:
Polymerization
Explanation:
Polymerization is the process by which molecules of small organic compounds combine repeatedly, in a regular manner, to form a complex organic compound. These small organic repeated units are called monomers, while the complex product formed are referred to as polymer.
In this reaction,
nC₂H₄ + -(C₂H₄-)n is the combination of smaller units of C₂H₄(ethene) to form larger units of (C₂H₄)n (polyethene).
Polyethene is formed due to addition polymerization which is the process where ethene break their double bonds to form links, so that the empirical formula of both are the same. This occurs in a chain reaction and the process is known as polymerization.
What is the three-dimensional shape of the molecule with this Lewis structure? A. Bent B. Linear C. Tetrahedral D. Trigonal planar.
Answers
Lewis structure is the electron dot representation of the atomic and molecular bonds of the molecules. Trigonal planar is the shape of the formaldehyde.
What is a trigonal planar shape?A trigonal planar shape of the molecule is the arrangement of the central atom attached to the other three atoms making them look triangle-shaped.
The attachment of the carbon to the two hydrogens and one oxygen atom can be given by the VSEPR theory. The number of the electron pair in the molecule is 3 making them \(\rm sp_{2}\) hybridized and hence have a trigonal planar shape.
Therefore, option D. trigonal planar is the shape.
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During the course of a catalytic reaction the following occurs: 1) Substrate is covalently bound and oriented with proximity to the active site residues. 2) Negative charge builds up on the substrate and is stabilized. 3) Oxidation of the enzyme followed by reduction to complete the catalytic cycle. What type of chemical species can facilitate these reactions? A) nucleophilic amino acids B) electrophilic groups C) prosthetic phosphate groups D) transition metal anions E) transition metal cations
Answers
During the course of a catalytic reaction Substrate is covalently bound and oriented with proximity to the active site residues.
The type of chemical species which can facilitate these reactions is transition metal cations.
What is an Enzyme?These are proteins that act as biological catalysts and accelerate chemical reactions.
They function by binding to the substrate and requires the use of transition metal cations which acts as cofactors.
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