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How many grams of solid NaF should be added to a 100-mL 1.0 × 10-³ M solution of LaCl3 at pH 3.00 to lower the concentration of La(III) to 1.0 × 10-6 M due to the formation of LaF²+? Ka.HF = 6.8 x 10-4, p₁ = 3.63 x 10³, M(NaF) = 41.9881 g/mol Answer: 2.86 g NaF

How many grams of solid NaF should be added to a 100-mL 1.0 × 10-³ M solution of LaCl3 at pH 3.00 to lower the concentration of La(III) to 1.0 × 10-6 M due to the formation of LaF²+? Ka.HF = 6.8 x 10-4, p₁ = 3.63 x 10³, M(NaF) = 41.9881 g/mol Answer: 2.86 g NaF

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem #9 How many grams of solid NaF should be added to a 100-mL 1.0 × 10-³ M solution of LaCl3 at pH 3.00 to lower the concentration of La(III) to 1.0 x 10-6 M due to the formation of LaF²+? Ka.HF = 6.8 x 10-4, B₁ = 3.63 x 10³, M(NAF) = 41.9881 g/mol - Answer: 2.86 g NaF 75
Transcribed Image Text:Problem #9 How many grams of solid NaF should be added to a 100-mL 1.0 × 10-³ M solution of LaCl3 at pH 3.00 to lower the concentration of La(III) to 1.0 x 10-6 M due to the formation of LaF²+? Ka.HF = 6.8 x 10-4, B₁ = 3.63 x 10³, M(NAF) = 41.9881 g/mol - Answer: 2.86 g NaF 75
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