A soil was measured for cation exchange by leaching 15 g of soil with 80 mL of solution of 1 M ammonium (NH4*) acetate solution buffered at pH 7. The leachate solution was analyzed and found to have 115 mg/L of Ca and 52 mg/L of Mg. The molecular weights are: Ca = 40.1 g/mol; Mg = 24.3 g/mol. 1 mole = 0.01 centimoles. (Watch unit conversions and significant figures!) (a) Calculate the equivalent moles of charge per kg of soil contributed by each cation (Ca and Mg) expressed as centimoles of charge per kilogram of soil (cmol, kgʻ1).

A soil was measured for cation exchange by leaching 15 g of soil with 80 mL of solution of 1 M ammonium (NH4*) acetate solution buffered at pH 7. The leachate solution was analyzed and found to have 115 mg/L of Ca and 52 mg/L of Mg. The molecular weights are: Ca = 40.1 g/mol; Mg = 24.3 g/mol. 1 mole = 0.01 centimoles. (Watch unit conversions and significant figures!) (a) Calculate the equivalent moles of charge per kg of soil contributed by each cation (Ca and Mg) expressed as centimoles of charge per kilogram of soil (cmol, kgʻ1).

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter31: Introduction To Analytical Separations

Section: Chapter Questions

Problem 31.21QAP

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