Question

A solution contains 50g of sugar in 350 g of water. Calculate the concentration of solution in terms of mass by mass percent of the solution. class 9​

Answer 1

Answer:

• Concentration of solution in terms of mass by mass percent is 12.5 %

Explanation:

Given

• Mass of sugar (solute) = 50 g
• Mass of water, (Solvent) = 350 g

To find

• Concentration of solution in terms of mass by mass percent

Formula required

• Formula for mass by mass percentage of compound

       Mass percent = (mass of solute / mass of solution) × 100 %

Solution

Since,

→ mass of solution = mass of solvent + mass of solute

therefore,

→ Mass of sugar solution = mass of sugar + mass of water

→ Mass of sugar solution = (  50 g ) + ( 350 g )

→ Mass of sugar solution = 400 g

Now, using formula for mass by mass percentage

→ Mass percent = ( mass of solute / mass of solution ) × 100 %

→ Mass percent = ( mass of sugar / mass of sugar solution ) × 100 %

→ Mass percent = ( 50 ) / ( 400 ) × 100 %

→ Mass percent = 50 / 4  %

→ Mass percent = 12.5 %

Therefore,

• Concentration of solution in terms of mass by mass percent of the solution is 12.5 %.

Answer 2

Given:-

50g of sugar.

350g of water.

∴Total quantity of sugar solution = 350g + 50g = 400g

To find:-

Mass by mass% of the solution.

Answer:-

Mass of sugar/ Mass of sugar solution × 100%

By substituting the above formula,

↦ (50g/400g) × 100

↦ 50/4

↦ 12.5%

∴Required answer = 12.5%