A 400-mL buffer solution is 0.350 M in ammonia (NH3) and 0.350 M in ammonium chloride (NH4Cl). Kb(NH3)=1.76×10−5 Part A: What is the initial pH of this solution? Express your answer using two decimal places. pH = 9.25 Part B: What is the pH after adding 125.0 mL of 0.100 M HBr to the initial buffer solution in Part A? Express your answer using two decimal places. pH = (not 10.26) Part C: What is the pH after adding 150.0 mL of 0.100 M LiOH to the initial buffer solution in Part A? Express your answer using two decimal places. pH = (not 8.33) --------------------------- Give the formula for tin(IV) hydroxide

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Chapter16: Acid-base Equilibria
Section: Chapter Questions
Problem 16.131QP: A quantity of 0.25 M sodium hydroxide is added to a solution containing 0.15 mol of acetic acid. The...
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A 400-mL buffer solution is 0.350 M in ammonia (NH3) and 0.350 M in ammonium chloride (NH4Cl).
Kb(NH3)=1.76×10−5

Part A:
What is the initial pH of this solution? Express your answer using two decimal places.

pH = 9.25

Part B:
What is the pH after adding 125.0 mL of 0.100 M HBr to the initial buffer solution in Part A?
Express your answer using two decimal places.

pH = (not 10.26)

Part C:
What is the pH after adding 150.0 mL of 0.100 M LiOH to the initial buffer solution in Part A?
Express your answer using two decimal places.

pH = (not 8.33)

---------------------------

Give the formula for tin(IV) hydroxide.

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