1. A 500 g dry clay sample contains 0.60 g of exchangeable Mg2+ ions, 0.20 g of exchangeable Al3+ ions, 0.80 g of exchan
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1. A 500 g dry clay sample contains 0.60 g of exchangeable Mg2+ ions, 0.20 g of exchangeable Al3+ ions, 0.80 g of exchan
1. A 500 g dry clay sample contains 0.60 g of exchangeable Mg2+ ions, 0.20 g of exchangeable Al3+ ions, 0.80 g of exchangeable Cl' ions, and 3.08 g of exchangeable NO3 ions, and no other exchangeable ions. What is the cation exchange capacity (CEC) of this clay? (6 marks)
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