Calculate the pH of a solution that is 0.70 M in HF ( Ka= 7.2 × 104) and 0.66 M in NaF.а. 3.40O b.0.12О с. 3.26O d. 10.74О е. 3.12 You have 75.0 mL of 0.14 M HA, a weak acid. After adding 38.0 mL of 0.10 MNaOH, the pH is 5.50. What is the Kavalue of HA?О а.'· 1.8 × 10–6O b.4.3 × 10-6Ос. 0.40O d.9.0 x 10-7d. oO e. none of these

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Calculate the pH of a solution that is 0.70 M in HF (Ka =7.2 x 104) and 0.66 M in NaF. а. 3.40 O b.0.12 с. 3.26 d. 10.74 Ое.3.12

Chemistry

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ISBN:9781305957404

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Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Question

Calculate the pH of a solution that is 0.70 M in HF ( Ka= 7.2 × 104) and 0.66 M in NaF.
а. 3.40
O b.0.12
О с. 3.26
O d. 10.74
О е. 3.12

You have 75.0 mL of 0.14 M HA, a weak acid. After adding 38.0 mL of 0.10 MNaOH, the pH is 5.50. What is the Ka
value of HA?
О а.
'· 1.8 × 10–6
O b.4.3 × 10-6
Ос. 0.40
O d.9.0 x 10-7
d. o
O e. none of these

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