What is the stoichiometric coefficient fo Ca in the reaction ?
`Ca+Al^(3+) rarr Ca^(2+)+Al`

Options

A. 2
B. 1
C. 3
D. 4

Answer

C

Explanation

`[Ca to Ca^(2+) + 2e^(-)] xx 3`
`[Al^(3+) + 3e^(-) to Al] xx 2`
`3ca to 3Ca^(2+) + 6e^(-)`
`2Al^(3+) + 6e^(-) to 2Al`
`overline(3Ca + 2Al^(3+) to 3Ca^(2+) + 2Al)`
Therefore, the stoichiometric coefficient of Ca in the given reaction is 3.