Question

solution of HCL is 38% by weight its density is 1.2 gram p
er ml calculate molality
​

Answer 1

Answer:

38%HCl by mass means 38g of HCl in 100g of solution.

As we know that,

molality =

Wt. of solvent

(in Kg)

No. of moles of solute

Therefore,

Weight of solvent =100−38=62g

Molecular weight of HCl=36.5g

No. of moles of HCl=

36.5

38

=1.041 mol

∴ molality =

62

1.041

×1000=16.79

Hence the molality of solution is 16.79.

Explanation:

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