Suppose 85 mL of a buffer solution that was 0.15 M HCHO2 and 0.25 M NaCHO₂ had 7.5 mL of 0.10 M hydrochloric acid added to it. Afterwards, 35 mL of this mixture was measured out, placed inside an Erlenmeyer flask, and diluted to 75 mL. What was the concentration of the hydroxide ion in the resulting solution in the flask? Ka for HCHO2, formic acid, is 1.7 x 10-4. a. 9.80 x 10-11 M b. 2.81 x 10-7 M c. 2.55 x 10-9 M d. 8.94 x 10-11 M 210 x 10-10 M P
Suppose 85 mL of a buffer solution that was 0.15 M HCHO2 and 0.25 M NaCHO₂ had 7.5 mL of 0.10 M hydrochloric acid added to it. Afterwards, 35 mL of this mixture was measured out, placed inside an Erlenmeyer flask, and diluted to 75 mL. What was the concentration of the hydroxide ion in the resulting solution in the flask? Ka for HCHO2, formic acid, is 1.7 x 10-4. a. 9.80 x 10-11 M b. 2.81 x 10-7 M c. 2.55 x 10-9 M d. 8.94 x 10-11 M 210 x 10-10 M P
Chapter15: Acid-base Equilibria
Section: Chapter Questions
Problem 7ALQ: You have a solution of the weak acid HA and add some HCl to it. What are the major species in the...
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