Question

Find the minority of 20per w/w NaOW​

Answer 1

Answer:

Step-by-step explanation:

Let the mass of solution be x gram.

Then mass of NaOH present in it= x*20/100

Molar mass of NaOH= 40gram

So, number of moles of NaOh present in the solution = (20x/100)*1/40 = x/200

Now,mass of solvent present in the solution =mass of solution-mass of solvent = x-20x/100 =80x/100 (in grams)

So molality of solution=(x/200)/(80x/100)*1000 =6.25