Question

500gm of 2molal of NaOH Solution calculate Wsolute
​

Answer 1

given : molarity of the solution = 0.2M

i.e, 0.2 moles of NaOH are present per litre of the solution.

so no. of moles of NaOH in 500ml of the solution is :

0.2×

1L

500mL

=0.2×

2

1

=0.1 moles

molar mass of NaOH = molar mass of (Na+O+H)=23+16+1=40g

so mass of 0.1 mole NaOH=40×0.1=4g

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