Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Explain leaching process. [2 Marks]

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\bullet$ Leaching is used when the ore is soluble in a solvent. [0.5 Mark]
$\bullet$ The powdered ore is dissolved in a chemical, usually a strong solution of NaOH. [0.5 Mark]
$\bullet$The chemical solution dissolves the metal in the ore and it can be extracted and separated from the gangue by extracting the chemical solution. [0.5 Mark]
$\bullet$ Extraction of the aluminium metal from bauxite ore is done using this process. [0.5 Mark]