a) Cation exchange is an important aspect of soil fertility (i) Explain what is involved in CEC (ii) A clay soil is ideally believed to have a chemical formula of SisAl4O20(OH)4. The CEC of soil can be calculated using the formula below CEC=100gx Net negative (eq) Molecular weight of clay Given that the net negative charge of the clay soil is 1.14 eq. Calculate the CEC. -x1000 meq eq¹ zeoltre 5) What are the names of the ores from which the following metals are extracted; Zinc, lead gree hocktte and Cadmium.

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".