Intro to Chemistry Worksheet

CHEM 1101

Homework Assignment #10

Chapter 10.1-10.5 Due: Monday, November 16 by 11:59 pm

1.) Which one of the following is a property of an acid?

  1. turns red litmus paper blue
  2. has a bitter taste
  3. reacts with metals to produce H2 gas (d.) all of the above.

2.) Which one of the following is the conjugate acid of HPO42-?

(a.) PO43- (b.) H2PO4

  1. H3PO4
  2. HPO42-

3.) Which one of the following household substances is not an acid?

  1. lemon juice
  2. vinegar
  3. glass cleaner (ammonia solution)
  4. orange juice

4.) Which one of the following is true for an acidic solution?

  1. [H3O+] = [OH]
  2. [H3O+] > [OH]
  3. [H3O+] < [OH] (d.) none of the above.
  4. What is the [H3O+] of a solution if its [OH] = 6.5 x 10-8 M? Kw = 1.0 x 10-14
  5. Calculate the pH of a solution if its [H3O+] = 2.0 x 10-5.
  1. What is expected to happen if a small amount of a base is added to a buffer solution?
  2. the pH of the solution will increase greatly.
  3. the pH of the solution will decrease greatly.
  4. the pH of the solution will increase by a small amount.
  5. the pH of the solution will decrease by a small amount.
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