Question

Equivalent weight of cu is

Answer 1

Copper will react with oxygen to form either brick red cuprous oxide (copper(I) oxide, with 63.5 g of copper for 8 g of oxygen) or black cupric oxide (copper(II) oxide, with 32.7 g of copper for 8 g of oxygen), and so has two equivalent weights. 

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Answer 2

Answer: The equivalent weight of copper is 31.8 g/eq.

Explanation:

Equivalent weight of an element is defined as the ratio of its molecular mass and the common valency of the element.

The formula used to calculate equivalent mass is:

$\text{Equivalent mass of copper}=\frac{\text{Molar mass of copper}}{\text{Common valency of copper}}$

We know that:

Molar mass of copper = 63.55 g/mol

Common valency of copper = 2

Putting values in above equation, we get:

$\text{Equivalent mass of copper}=\frac{63.55}{2}=31.8g/eq.$

Hence, the equivalent weight of copper is 31.8 g/eq.