Question

If the quantity of metal in a metallic oxide is 60%, what is its equivalent weight?

Answer 1

Answer:

12 g

Explanation:

The idea here is that you're looking for the mass of this unknown metal that can combine with 8 gof oxygen, which is what the equivalent mass of the metal tells you in this context.

To make the calculations easier, pick a 100-gsample of this metal oxide. According to its percent composition, this sample will contain

60%.metal 100 g sampleaaa−−−−−−−−−→ 60 g metal

40%.oxygen 100 g sampleaaa−−−−−−−−−→ 40 g oxygen

So, you know that 60 g of this unknown metal combine with 40 g of oxygen, which means that 8 g of oxygen will combine with

8g oxygen⋅60 g metal40g oxygen=12 g metal

Therefore, you can say that the equivalent massof the metal is equal to

equivalent mass of metal in 60% metal oxide = 12 g−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−