Question

The molality of an aq. solution of ethanol (molar mass = 46 g/mol) , which contain 50 gm of alcohol in 500ml of solution is​

Answer 1

Answer:

m=w2/M×1000/w1

m=50/46×1000/500

Explanation:

w2=given mass

w1=given mass of solvent

M=molecular mass of compound

Answer 2

Answer:

2.18mol/L

Explanation:

Mass of ethyl alcohol/litre is:-

(50×1000)/500=100g

No. of moles of alcohol/litre:-

(Massing/litre)/(Molarmassing/mol)=

=>100/46=2.18

Thus, the solution contains 2.18 moles of ethyl alcohol per litre of the solution.

So, the molarity of the solution is 2.18 mol/L