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2. A student was asked to make up a 10% w/w solution of sodium carbonate. Calculate the amount of solute and solvent required to prepare tha
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Answer:
The amount of the solute and solvent can be calculated by the molality. The equation for the molality is as following:
Molality= (mass of solute*1000)/(molar mass*mass of solvent)
it is given that, 10% of Na2CO3 is made,
It means 100gram solution contains 10gram Na2CO3
So, the Mass of solute = 10 gram
then,
Mass of solvent= 100–10 = 90 gram
And, the molar mass of the Na2CO3 = 106 gram
from, now with the help of formula, we can calculate the amount of solute and solvent.