Question

90 g of mgcl2 is added to enough water to make the volume upto 500ml calculate the molality and normality of the solution​

Answer 1

Explanation:

ANSWER

Calcium bromide has a molar mass of 200 g/mol.

The number of moles of CaBr

2

=

200 g/mol

20 g

=0.10 mol

Volume of solution=500 mL×

1000 mL

1 L

=0.500 L

The molarity of CaBr

2

=

0.500 L

0.10 mol

=0.2 M

Hence the correct option is B.