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How many grams to the nearest 0.01 g of NH4Cl must be added to 850 mL of 1.103-M solution of NH3 in order to prepare a pH 9.60 buffer?
Updated: 8/11/2023
Lamille4
Lvl 1
∙ 8y agoBest Answer
pOH 14 - pH 4.4
pKb 4.7
4.4 4.7 + log [NH4+]/ 1 x 10^-3
10^- 0.3 0.501 [NH4+]/ 1 x 10^-3
[NH4+] 0.000501 M
moles 0.000501 x 0.850L 0.000426
mass 53.49 x 0.000426 0.0228 g
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∙ 9y ago10.5
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