Concentration of a Solution

How many litres of 15% (mass/ volume) sugar solution would it take to get 75 g of sugar?

• 500 ml

• 5000 ml

• 5 ml

• 50 ml

Calculate the mass of sodium sulphate required to prepare its 20% (mass percent) solution in 100 g of water.

• 45 kg

• 25 kg

• 25 gm

• 24 gm

A teacher told three students A, B and C to prepare 25% solution (mass by volume) of KOH. Student A dissolved 25 g of KOH in 100 g of water, student B dissolved 25 g of KOH in 100 mL of water and student C dissolved 25 g KOH in water and made the volume 100 mL. Which one of them has made required 25% solution?

• Student A

• Student C

• Student B

• Student A & B

To make a saturated solution 36 g of sodium chloride is dissolved in 100 g of water at 293 K. find its concentration at this temperature.

• 100 gm

• 36 gm

• 64 gm

• 136 gm

A solution is prepared by adding 40 g of sugar in 100 g of water. Calculate the concentration in terms of mass by mass percentage of solution.

• 28.57

• 29.46

• 20

• None of the above

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

• 12%

• 12.9%

• 21%

• 12.5%

During an experiment the students were asked to prepare a 10 % (Mass/ Mass) solution of sugar in water. Ramesh dissolved 10 g of sugar in 100 g of water while Sarika prepared it by dissolving 10 g of sugar in water to make 100 g of the solution. Are the two solutions of the same concentration? Determine both the concentrations.

• 10% and 10%

• 9.09 % & 10% respectively

• 15% & 25%

• All of the above

2ml of water is added to 4g of a powdered drug. The final volume is 3ml. Find the mass by volume percentage of the solution?

• 133%

• 100%

• 33%

• 1%

Many people use a solution of Sodium Phospate to clean walls before putting up wallpaper. The recommended concentration is 1.7%(m/v). Find the mass of Sodium Phospate needed to make 2.0L of the solution?

• 40gm

• 4 gm

• 30gm

• 34 gm

1. A solution contains 40 g of common salt in 320 g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

• 1.1

• 0.11

• 11.1

• 111