Question

In 2 hours, a certain current liberates 0.504 g hydrogen. How many grams of copper can be deposited by the same current flowing for the same time in a CuSO₄ solution?

(Molar mass of Cu = 63.5 g mol⁻¹, H₂ = 2.0 g mol⁻¹)

Options

• 63.5 g

• 16.0 g

• 31.8 g

• 32 g

Answer 1

16.0 g

Explanation:

`"Mass of Hydrogen"/"Mass of Copper" = "Equivalent mass of hydrogen"/"Equivalent mass of copper"`

`0.504/"Mass of copper" = 1/(63.5//2)`

Amount of copper deposited = `0.504 xx 63.5/2` = 16 g