Question

1.05g of metal gives on oxidation 1.5 g of its oxide.calculate it's equivalent mass​

Answer 1

Answer:

Yes , I agree with this statement ! In the chapter , the last leaf , Johnsy had lost hope for living . She thought that when the last leaf of the ivy creeper would fall , she was going to die ! But , after Behrman painted the masterpiece , and it was the leaf , Johnsy realised that she had been very pessimistic and hence had lost interest in life . So , she promised her friend , Sue that she would live for her friends and her dear ones . This hope that wad built in her and the medicines helped her recover from pneumonia .

Explanation:

Answer 2

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Given:

1.05 g of metal gives 1.5 g of oxide on oxidation

To find:

Equivalent mass of metal element = ?

Solution:

Weight of metal element = 1.05 g

Weight of oxide = 1.5 g

Weight of oxygen = Weight of oxide - Weight of metal element

Weight of oxygen = 1.5 - 1.05

= 0.45 g

So, weight of oxygen is 0.45 g

$\\ \\ equivalent \: \: mass \: \: of \: \: element \: \\ \\ = \dfrac{weight \: of \: metal \: element}{weight \: of \: oxygen} \times 8 \\ \\ = \dfrac{1.05}{0.45} = 2.33$

Answer:

Thus, equivalent mass of metal element is 2.33

Knowledge booster:

⟹ There is no unit for equivalent mass

⟹ The above question is based on oxide formation method in which a known mass of element is changed into oxide.

⟹ If hydrogen is evolved from acids by elements it is hydrogen displacement method. At that time,

$\\ \\ equivalent \: \: mass = \\ \dfrac{weight \: of \: metal}{weight \: of \: hydrogen \: gas} \times 1.008$

⟹ Equivalent mass of normal ions , base or acid is Molecular weight/valency or Basicity or acidity

⟹ Try to solve more such questions to get good hold on it