How many moles of NH3 must be dissolved in water to give 615.4 mL of solution with a pH of 10.96? K of ammonia is 1.8 x 10

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Chapter16: Acid-base Equilibria
Section: Chapter Questions
Problem 16.126QP: A solution is prepared from 0.150 mol of formic acid and enough water to make 0.425 L of solution. a...
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Incorrect. Did you remember to include the negative sign when finding the concentration of OH from the pOH? Did you use
the pOH and not the pH?
How many moles of NH3 must be dissolved in water to give 615.4 ml of solution with a pH of 10.96? K, of ammonia is 1.8 x 10s,
I mol NH3
eTextbook and Media
Hint
Assistance Used
Given the pH, you can calculate pOH and hence the hydroxide ion concentration, (OH). This concentration termis a variable in
the equilibrium constant expression for ammonia ionizing as a base in water. For the determined value of (OH ]. INHal must
likewise have a specific value at equilibrium. Determine this concentration via the equilibrium constant expression. Finally.
multiply by the volume of the solution to determine the moles of NH3 needed.
Transcribed Image Text:Incorrect. Did you remember to include the negative sign when finding the concentration of OH from the pOH? Did you use the pOH and not the pH? How many moles of NH3 must be dissolved in water to give 615.4 ml of solution with a pH of 10.96? K, of ammonia is 1.8 x 10s, I mol NH3 eTextbook and Media Hint Assistance Used Given the pH, you can calculate pOH and hence the hydroxide ion concentration, (OH). This concentration termis a variable in the equilibrium constant expression for ammonia ionizing as a base in water. For the determined value of (OH ]. INHal must likewise have a specific value at equilibrium. Determine this concentration via the equilibrium constant expression. Finally. multiply by the volume of the solution to determine the moles of NH3 needed.
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