1. A 100 mL solution of 0.200 M HF is titrated with 0.100 M Ba(OH)_{2}. What is the volume of Ba(OH)_{2} needed to reach equivalence point?

200 mL

50 mL

100 mL

300 mL

Cannot determine based on the provided information.

2. A 100 mL solution of 0.200 M NH_{3} is titrated with 0.100 M HCl. What is the volume of HCl needed to reach equivalence point?

200 mL

100 mL

50 mL

300 mL

Cannot determine based on the provided information.

3. A 100 mL solution of 0.200 M NH_{3} is titrated with 0.100 M HF. What is the volume of HF needed to reach equivalence point?

100 mL

50 mL

300 mL

Cannot determine based on the provided information.

4. A 100 mL solution of 0.200 M Sr(OH)_{2} is titrated with 0.100 M H_{3}PO_{4}. What is the volume of H_{3}PO_{4} needed to reach equivalence point?

100 mL

200 mL

50 mL

300 mL

133 mL

5. A 100 mL solution of unknown concentration H_{2}SO_{4} is titrated with 200 mL of 0.100 M Ba(OH)_{2} solution to reach equivalence point. What is the concentration of H_{2}SO_{4} solution?

0.100 M

0.050 M

0.020 M

0.200 M

Cannot determine based on the provided information.

6. A 100 mL solution of unknown concentration H_{3}PO_{4} is titrated with 200 mL of 0.100 M Sr(OH)_{2} solution to reach equivalence point. What is the concentration of H_{3}PO_{4} solution?

0.100 M

0.133 M

0.200 M

0.050 M

0.300 M

A 100 mL solution of 0.200 M HF(*K*_{a}=6.6*10^{-4}) is titrated with 0.100 M Ba(OH)_{2}. It takes 100 mL of Ba(OH)_{2} to reach the equivalence point. What is the pH at half-equivalence point?

7

3.5

3.18

10.5

10.82

8. Based on your answer in #7, what is the concentration of H_{3}O^{+} at half-equivalence point?

6.6 Ã 10^{-4} M

6.61 Ã 10^{-4} M

10^{-7} M

3.2 Ã 10^{-4} M

3.16 Ã 10^{-4} M

9. A 100 mL solution of 0.200 M unknown weak acid is titrated with 0.100 M NaOH. The pH at half-equivalence point is 5.52. What is the *K*_{a} value for the unknown weak acid?

3.02 Ã 10^{-6}

3.31 Ã 10^{5}

3.0 Ã 10^{-6}

3.3 Ã 10^{5}

Cannot determine based on the provided information.

10. Based on your answer in #9, what is the concentration of H_{3}O^{+} at half-equivalence point?

3.0 Ã 10^{-6}

3.02 Ã 10^{-6}

3.31 Ã 10^{5}

3.3 Ã 10^{5}

Cannot determine based on the provided information