QUESTION 7 The pKa of formic acid is 3.75. What is the Ka of formic acid? a. 1.8 × 10^-18 b. 5.6 × 10^-11 c. 1.8 × 10^-4 d. 5.6 × 10^3 QUESTION 8 What is the mass of NaCl in a 0.500-L bottle of 2.00 M NaCl? a. 29.3 g b. 58.5 g c. 117 g d. 234 g
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So, to find the Ka, we can rearrange the equation to Ka = 10^-pKa. Substituting the given pKa value, we get Ka = 10^-3.75 = 1.8 * 10^-4. So, the answer is c. 1.8 * 10^-4. Show more…
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