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Which reducing agent is employed to get ...

Which reducing agent is employed to get copper from the low grade copper ore ?

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Low grade copper ore is leached with sulphuric acid to form soluble copper sulphate. Scrap iron or hydrogen act as reducing agents to recover copper.
`CuSO_(4)(aq)+Fe(s) to FeSO_(4)(aq)+Cu(s)`
`CuSO_(4)(aq)+H_(2)(g) to H_(2)SO_(4)(aq)+Cu(s)`
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Which reducing agent is employed to get copper from the leached low-grade copper ore ?

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