Question

5.40 g of copper oxide was obtained by treating the 4.32 g of copper with nitric acid and subsequent ignition. Similarly 2.3 g of copper oxide on reduction gave 1.84 g of copper in another experiment. Show that these data illustrate the law of constant composition.​

Answer 1

Here we have to show the ratio of reactants and products are same

Case-1

• Copper oxide used=5.40g
• Copper produced=4.32g

ratio:-

`\\ \sf\longmapsto (5.40)/(4.32)=1.25\approx 1`

Case:-2

• Copper oxide used=2.3g
• Copper produced=1.8g

ratio:-

`\\ \sf\longmapsto (2.3)/(1.8)`

`\\ \sf\longmapsto 1.27\approx 1`

Hence verified