Last modified: Wed 12/31/1969 06:00:00 pm
ACA

Oklahoma State University

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


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1. Determine K for each of the following reactions;

a) C2H3O2- + H2O HC2H3O2 + OH-

K =

b) NH3 + H+ NH4+

K =

2. Consider the solution below and indicate which of the following is the best classification;

Classification

Weak Acid
Weak base
Strong Acid
Strong base
Salt (SA/SB)
Salt (SA/WB)
Salt (WA/SB)
Common Ion
Buffer
Neutralization

a) 0.500 M HClO

b) 0.500 M (C2H5)3N

c) 0.500 M NH4ClO4

d) 0.500 M Na2CO3 and 0.500 M NaHCO3

e) 0.500 M HC3H5O2 and 0.500 M KOH

3. Given 500. mLs of a solution that is 0.100 M NH3 and 0.100 M NH4NO3?

a) Write the balanced chemical equation that can be used to calculate the pH of this solution.

b) What is the value of K for this reaction?

K =

c) Calculate the pH of the solution. pH =

d) If 0.0050 moles of NaOH is added to the solution would you expect the pH of the solution to increase, decrease or remain the same?

e) Calculate the new pH of the solution.

pH =

4. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

5. If there is one question you would like to have answered in lecture, what would that question be?