Question

salt NaCl obtained from bay of Bengal was found to have 39.52% of sodium and 2.5 g sample of Salt from Sambhar Lake in Rajasthan was found to have 0.982 g sodium. Prove that these observations confirm the law of constant proportion.​

Answer 1

$law \: of \: constant \: proportion$

states that no matter a chemical compound is obtained from any source it will contain the same element combined in a definite proportion by weight.

Now , we have taken NaCl from two different sources both these salt contains Na as well as Cl

right.

$source \: 1$

Let NaCl be 100g , then Na is 39.52g (given)

So , Cl would be 60.48g .

That is Na : Cl = 40 : 60 or 2:3 , right ._______(1)

$source \: 2$

Given , 2.5 g NaCl contains 0.982 g of Na

So, 100 g of NaCl will contain 39.28g of Na

and thus, Cl would be 60.48g.

That is , Na : Cl = 40 :60 or 2:3 , right _______(2)

Now, we can state that the above reaction is in accordance to Law of Constant Proportion or definite proportion.

Hope it helps you !!