Question

a) Write the steps involved in the extraction of pure metals in the middle of the
activity series from their carbonate ores.
b)/ How is copper extracted from its sulphide ore ? Explain the various steps
supported by chemical equations. Draw labelled diagram for the electrolytic
refining of copper.​

Answer 1

Answer:

The metals in the middle of the reactivity series occur in form of their carbonate ores or sulphide ores .

Firstly , the carbonate ores are converted into oxide ores by the process of calcination i.e. burning in the absence of oxygen .

let us take an example of zinc :

zinc carbonate ---------heated -----> zinc oxide + carbon monoxide

similarly the sulphide ores are converted into oxides by the process of roasting .

let us take an example of cinnabar ore of mercury :

mercury sulphide + oxygen ------heated------> mercury oxide + sulphur dioxide

then the oxides are converted into pure metals by the process of reduction .

For example ,

zinc oxide + carbon ------> zinc metal + carbon monoxide .

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