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What mass of solid sodium formate (of MW 68.01) must be added to 120 mL of 0.37 mol/L formic acid (HCOOH) to make a buffer solu- tion having a pH of 3.87? K = 0.00018 for HCOOH. Answer in units of g.

What mass of solid sodium formate (of MW 68.01) must be added to 120 mL of 0.37 mol/L formic acid (HCOOH) to make a buffer solu- tion having a pH of 3.87? K = 0.00018 for HCOOH. Answer in units of g.

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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What mass of solid sodium formate (of MW 68.01) must be added to 120 mL of 0.37 mol/L formic acid (HCOOH) to make a buffer solu- tion having a pH of 3.87? K = 0.00018 for HCOOH. Answer in units of g. When a small amount of HCI is added to a solution of 0.10 M NH3 and 0.10 M NH CI, 1. the H+ ions react with NH ions. 2 the K, for NH3 becomes larger. 3. more NH ions are produced. 4 the number of moles of NH3 increases. 5 the pH of the solution increases.
Transcribed Image Text:What mass of solid sodium formate (of MW 68.01) must be added to 120 mL of 0.37 mol/L formic acid (HCOOH) to make a buffer solu- tion having a pH of 3.87? K = 0.00018 for HCOOH. Answer in units of g. When a small amount of HCI is added to a solution of 0.10 M NH3 and 0.10 M NH CI, 1. the H+ ions react with NH ions. 2 the K, for NH3 becomes larger. 3. more NH ions are produced. 4 the number of moles of NH3 increases. 5 the pH of the solution increases.
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