1. Circle the following compound whose conjugate base will have a pH of 14 for a

Question

1. Circle the following compound whose conjugate base will have a pH of 14 for a 1 M aqueous solution? Clearly show your work or reasoning below.

a) C2H6

b) HOCN

c) HAsF6

d) FCOOH

e) B(OH)3

2. Circle the following that when reacted with an equivalent amount of NaOH will have a 1 M solution with a pH closest to 9? Clearly show your work or reasoning below.

a) C2H6

b) HOCN

c) HAsF6

d) FCOOH

e) B(OH)3

3. What is the pH of a 0.1 M solution of the base pyridine (C5H5N)? pKa = 5 (for the protonated form). Circle your answer and please show all your work below.

a) 2

b) 5

c) 9

d) 14

e) 22

a) C2H6

b) HOCN

c) HAsF6

d) FCOOH

e) B(OH)3

Circle the following compound whose conjugate base will have a pH of 14 for a 1 M aqueous solution? Clearly show your work or reasoning below. Circle the following that when reacted with an equivalent amount of NaOH will have a 1 M solution with a pH closest to 9? Clearly show your work or reasoning below. What is the pH of a 0.1 M solution of the base pyridine (C5H5N)? pKa = 5 (for the protonated form). Circle your answer and please show all your work below.

Explanation / Answer

1.) a-C2H6 becuase it weak acid its conjugate base will be strong

2) e- B(OH)3 in strong base weak acid buffer pH = Pka of acid

3) b- pH = 5

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