What is the percentage composition of water in Gypsum salt?

25 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

21 %

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

30 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

19 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A
21 %

Gypsum ( $C a S O_{4} .2 H_{2} O)$ is a hydrated salt and contains water of crystallisation.

$H_{2} O$ = $2 \times 1 + 16$ = 18 g

$2 H_{2} O$ = $2 \times 18$ = 36 g

$C a S O_{4}$ = $40 + 32 + 64$ = 136 g

Molecular weight of $C a S O_{4} .2 H_{2} O$ = 136 + 36 = 172 g

Percentage = $\frac{36}{172} \times 100$ = 20.93%

$C a S O_{4} .2 H_{2} O$ = 20.93%

Suggest Corrections

Similar questions

Calculate the percentage composition of nitrogen in $N H_{4} N O_{3} .$

Calculate the percentage composition in terms of mass of a
solution obtained by mixing 300 g of a 25% and 400 g of a 40% solution by mass.

0.50 g

K_{2} C O_{3}

L i_{2} C O_{3}

30 m L

0.25 N H C l

30

25