Question

CaSO4.XH2O looses 6.2% of water upon heating.The value of x will be(1) 2(2) 3(3) 4(4) 1/2​

Answer 1

Answer:

The answer is 1/2.

Step-by-step explanation:

As we know that:

Molecular weight of water x (x) / Mass of salt

The mass of salt to be taken has to be that of before water of crystallisation. here it is CaSO4.

Thus,

18x / 40 + 32 + 64 = 6.2%

18x / 136 = 6.2 /100

Solve for x:

18x / 136 = 6.2/100

18x = 6.2 / 100 x 136

18x = 8.4

x = 8.4 / 18

x = 0.46 ~ 0.5

x = 1/2

Thus the value of x will be 1/2.

Answer 2

Answer:

Answer:

The answer is 1/2.

Step-by-step explanation:

As we know that:

Molecular weight of water x (x) / Mass of salt

The mass of salt to be taken has to be that of before water of crystallisation. here it is CaSO4.

Thus,

18x / 40 + 32 + 64 = 6.2%

18x / 136 = 6.2 /100

Solve for x:

18x / 136 = 6.2/100

18x = 6.2 / 100 x 136

18x = 8.4

x = 8.4 / 18

x = 0.46 ~ 0.5

x = 1/2

Thus the value of x will be 1/2.

Step-by-step explanation:

Hope this answer will help you.✌️