Chemistry, asked by mahekv17, 7 months ago

If 1.27g Cu is obtained by reduction of one sample of Cu2O then the amount of oxygen in sample is ..........g.

Answers

Answered by Rameshjangid

Answer: 0.16 grams of oxygen

Given: 1.27 g of Cu obtained from a sample

To find: Amount of oxygen in the sample

Explanation:

1.27 grams of copper is obtained by the reduction of a sample of $Cu_{2}O$

The molar mass of copper = 63.5

So, the mass of Cu in a sample of Cu2O=127g

Mass of O in sample =16g

So in the sample,

For 127 grams of copper, 16 grams of oxygen used

If Cu mass in sample = 1.27 gram

then, the Mass of oxygen in the sample = $\frac{16*1.27}{127} = 0.16$

Hence, the amount of oxygen in the sample = 0.16 gram

Important definition

Oxidation:

According to classical or earlier concepts, oxidation is a process involving the addition of oxygen or electronegative elements or the removal of hydrogen or electropositive elements.

Reduction:

According to classical or earlier concepts, reduction is the process of adding hydrogen or electropositive elements or removing oxygen or electronegative elements.