Question

A solution is made by adding 4g of solute in 36g of water.What is the mass percent of the solution?​

Answer 1

Given:-

→ Mass of solute = 4g

→ Mass of water = 36g

To find :-

→ Mass percent of the solution

Solution:-

It is clear that water is solvent here. We are given with the mass of solute and solvent. So firstly, let's calculate the total mass of the solution. It can be calculated as follows :-

Mass of solution :-

= Mass of solute + Mass of solvent

= (4 + 36) g

= 40g

Hence, total mass of the solution is 40g. Now let's calculate the mass percentage.

Mass percentage of a solution :-

= Mass of solute/Mass of solution × 100

By substituting values,we get :-

= 4/40 × 100

= 100/10

= 10%

Thus, mass percent of the solution is 10% .

Some Extra Information:-

Volume percentage of a solution :-

= Vol.of solute/Vol.of solution × 100

Mass/Volume percentage of a solution :-

= Mass of solute/Vol.of solution × 100

Answer 2

Mass of solute = 4 g

Mass of Solvent = 36 g (Water)

$\therefore$ Mass of Solution = 40 g

We know,

w/w% of concentration = (Mass of Solute)/(Mass of Solution) × 100%

$\therefore$ w/w% of concentration = (4 g)/(40 g) × 100%

$\leadsto$ 1/10 × 100%

$\leadsto$ 10% [Solution]