1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jonny [76]
1 year ago
5

Find the pH of the equivalence point(s) and the volume (mL) of 0.0372 M NaOH needed to reach the point(s) in titrations of(a) 42

.2 mL of 0.0520 M CH₃COOH
Chemistry
1 answer:
Neko [114]1 year ago
3 0

The pH of the equivalence points is 8.54

Concept of pH

A solution's acidity or alkalinity can be determined based on the concentration of hydrogen ions in the solution, or pH. Acidic aqueous solutions at 25 °C have a pH under 7, while basic or alkaline aqueous solutions have a pH above 7. Since the concentration of H3O+ is equal to the concentration of OH in pure water, a pH level of 7.0 at 25°C is referred to as "neutral". Strong bases may have a pH above 14, while very strong acids may have a pH below 14.

0.0520 M CH3COOH in 42.2 mL of moles is as follows:

2.194x103 mol CH3COOH = 0.0422L (0.0520mol / L)

that react with NaOH, resulting in:

NaOH + CH3COOH = CH3COO + Na+ + H2O

Thus, 1 mole of acetic acid and 1 mole of NaOH react.

As a result, 2.194x103 mol of NaOH are required to reach the equivalence point in volume:

To attain the equivalency point, 2.194x103 mol (1L / 0.0372mol) = 0.05899L 58.99mL of 0.0372 M NaOH

You will only have CH3COO at the equivalency point because it is in equilibrium with water, so:

H2O(l) + CH3COO(aq) CH3COOH(aq) + OH (aq)

A definition of equilibrium is:

Kb = 5.6x1010 = [OH] / [CH3COO] / [CH3COOH]

2.194x103mol of CH3COO has a molarity of (0.05899L + 0.0422L) = 0.02168M.

Therefore, equilibrium concentrations are:

[CH3COO]=0.02168M-X [CH3COOH]=X [OH]=X

5.6x1010 = [X] [X] / [0.02168M - X] converts to Kb.

1.214x1011 - 5.6x1010X = X2 X2 + 5.6x1010X - 1.214x1011 = 0 Finding the value of X:

False response; there are no negative concentrations. X: -3.48x106

As [OH] = X, [OH] = 3.484x106M, X is 3.484x106.

As 14 = pOH + pH pH = 8.54, pOH = -log [OH], or 5.46.

To know more about pH visit :

brainly.com/question/12546875

#SP4

You might be interested in
What do we call genes
qwelly [4]

Hi there so i need one more brainliest mark so if i get it right can i get brainliest please  :)

A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases

4 0
2 years ago
How much energy (in Joules) is needed to increase the temperature of 25 grams of glass by 5.0C. Aluminum Iron Glass Copper Water
vitfil [10]

Answer:

25 grams of glass by 5.oc aluminium iron glass copper water

4 0
2 years ago
What direction do the plates have to move in order for an earthquake to occur?
Bess [88]
they would be pushing together
4 0
3 years ago
Read 2 more answers
Which phase has the greatest structure
Zina [86]
A the solid.
it’s solid because solid is harder than gas and liquid which makes it a greater structure
8 0
3 years ago
Please help..
Hoochie [10]

Answer:

1.

Explanation:

Let's start with the hydrogen. If we have 4 grams of hydrogen, it would be enough for 4 * 9 = 36 grams of water. Well, that can't be possible ...

4 votes

8 0
1 year ago
Other questions:
  • Calculate the molecular weights for NH3 and SF6.
    8·1 answer
  • Which of these are physical changes in matter chech all that apply
    5·2 answers
  • Nuclear reactions in a reactor produce a lot of thermal energy. That energy then flows and warms up water, which boils and produ
    7·2 answers
  • An example of binary compound is
    8·2 answers
  • Brainliest and a free hug :) thank you!!
    11·1 answer
  • What type of compound is formed by the transfer of electrons from one atom to another?
    13·1 answer
  • The chemical equation shows the production of magnesium chloride.
    8·1 answer
  • Over time, what color will all the fish be because of natural selection?
    8·2 answers
  • An isotope with a half life of 10 min and a starting sample size of 100 g would have
    14·1 answer
  • The highest energy occupied molecular orbital in the C-C bond of the C2 molecule is?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!