Answered: Which pair of substances can form a…

Which pair of substances can form a buffer in aqueous solution? Justify your answer. а. НРО, Na;PO, b. HNO3, NANO3 с. Н.СО, NaNО: d. NH3 and (NH4)2SO4

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 14QAP: A buffer solution is prepared by adding 5.50 g of ammonium chloride and 0.0188 mol of ammonia to...

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Question

Which pair of substances can form a buffer in aqueous solution? Justify your answer.
а. НРО, Na;PO,
b. HNO3, NANO3
с. Н.СО, NaNО:
d. NH3 and (NH4)2SO4

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Each symbol in the box below represents a mole of a component in one liter of a buffer solution; represents the anion (X-), = the weak acid (HX), = H+, and =OH. Water molecules and the few H+ and OH- ions from the dissociation of HX and X- are not shown. The box contains 10 mol of a weak acid, , in a liter of solution. Show what happens upon (a) the addition of 2 mol of OH- (2 ). (b) the addition of 5 mol of OH- (5 ). (c) the addition of 10 mol of OH- (10 ). (d) the addition of 12 mol of OH- (12 ). Which addition (a)-(d) represents neutralization halfway to the equivalence point?
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