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Calculate Weak Acids

Total questions: 7

Worksheet time: 21mins

Name
Class
Date
1.

Acetic Acid is a weak monoprotic acid. It's concentration is 0.20M and it's equilibrium concentration of H+ ions is 0.0019M. Calculate it's Ka value.

a)

1.8x10 -5

b)

1.8x10 -15

c)

.0019

d)

5.56x10 -10

2.

Uric Acid is a weak monoprotic acid. It's initial concentration is 0.110M and it's equilibrium concentration of H+ ions is 0.034M. Calculate the final concentration of Uric acid.

a)

.011

b)

.034

c)

.076

d)

1.47

3.

True or False? The stronger the acid, the larger the value of the Ka.

a)

True

b)

False

4.

Select ALL of the strong acids.

a)

HClO4

b)

HNO2

c)

HF

d)

HI

e)

HNO3

5.

Which represents an acid with the smallest Ka value?

a)

HX

b)

HY

c)

HZ

6.

Which acid would have the smallest pH value?

a)

HX

b)

HY

c)

HZ

7.

Gallic Acid is a weak monoprotic acid. It's initial concentration is 0.28 mol/L and it's equilibrium constant is 3.94 x 10-5. Calculate the solution's pH value.

a)

3.9x10-5

b)

4.96

c)

2.48

d)

0.28