Ways of Representing Concentration

Q.

A solution contains 30 mL of ethyl alcohol mixed with 100 mL of water. The concentration of the solution in terms of volume by volume percentage is ___ %.

Q.

A solution contains 40 mL of ethyl alcohol mixed with 100mL of water. What is the concentration of the solution in terms of volume by volume percentage?

Q. A solution contains 50 mL of ethyl alcohol in 150 mL of water. Calculate the concentration of the solution in terms of volume by volume percentage of the solution.

1. 50%
2. 25%
3. 20%
4. 52%

Q. The formula for concentration of solution in terms of volume by volume percentage is:

1. $\frac{\text{volume of solute}}{\text{volume of solution}}\times 100$
2. $\frac{\text{volume of solution}}{\text{volume of solute}}\times 100$
3. $\frac{\text{volume of solvent}}{\text{volume of solute}}\times 100$
4. $\frac{\text{volume of solute}}{\text{volume of solvent}}\times 100$

Q.

If 25 grams of sodium chloride is completely dissolved in 175 grams of water to form a solution, what is the concentration of the solution in mass percent?

1. 20 per cent

2. 12.5 per cent

3. 10 per cent

4. 25 per cent

Q.

A solution contains 30ml of ethyl alcohol mixed with 100ml of water. What is the concentration of the solution in terms of volume by volume percentage?

1. 23.00%

2. 23.33%

3. 23.07%

4. 23.99%

Q.

The formula for concentration of solution in terms of volume by volume percentage is:

1. 

2. 

3. 

4. 

Q.

Which of the following formula can be used for calculating concentration?

(i) $\frac{\text{mass of solute}}{\text{mass of solution}}\times 100$

(ii) $\frac{\text{mass of solute}}{\text{mass of solute + solvent}}\times 100$

(iii) $\frac{\text{mass of solvent}}{\text{mass of solution}}\times 100$

(iv) $\frac{\text{mass of solvent}}{\text{mass of solute + solvent}}\times 100$

(v) $\frac{\text{mass of solute}}{\text{volume of solution}}\times 100$

(vi) $\frac{\text{mass of solvent}}{\text{volume of solution}}\times 100$

1. (iv), (iii), (vi)

2. (i), (ii), (v)

3. (iv), (iii), (v)

4. (i), (ii), (vi)

Q.

Which among the following formulae can be used for calculating the concentration?

(i) $\frac{\text{mass of solute}}{\text{mass of solution}}\times 100$

(ii) $\frac{\text{mass of solute}}{\text{mass of solute + solvent}}\times 100$

(iii) $\frac{\text{mass of solvent}}{\text{mass of solution}}\times 100$

(iv) $\frac{\text{mass of solvent}}{\text{mass of solute + solvent}}\times 100$

(v) $\frac{\text{mass of solute}}{\text{volume of solution}}\times 100$

(vi) $\frac{\text{mass of solvent}}{\text{volume of solution}}\times 100$

1. (i), (ii), (vi)

2. (iv), (iii), (v)

3. (i), (ii), (v)

4. (iv), (iii), (vi)

Q. A solution is prepared by adding $2$ g of a substance A to $18$ g of water. Calculate the mass percent of the solute:

1. 5%
2. 20%
3. 10%
4. 30%

Q.

2 litres of alcohol is present in 8 litres of an aqueous solution of alcohol. The volume percent will be?

1. 20%

2. 22.5 %

3. 25 %

4. 27.5%

Q. A solution is prepared by dissolving 10 grams of solute in 100 grams of water. Calculate the mass percentage of the solution.

1. 9.09%
2. 10%
3. 9.90%
4. 10.09%

Q.

A solution contains 30 mL of ethyl alcohol mixed with 100 mL of water. What is the concentration of the solution in terms of volume by volume percentage?

1. 23.00 %

2. 23.07 %

3. 22.00%

4. 25.66 %

Q. The formula for concentration of solution in terms of volume by volume percentage is:

1. $\frac{\text{volume of solute}}{\text{volume of solution}}\times 100$
2. $\frac{\text{volume of solution}}{\text{volume of solute}}\times 100$
3. $\frac{\text{volume of solvent}}{\text{volume of solute}}\times 100$
4. $\frac{\text{volume of solute}}{\text{volume of solvent}}\times 100$

Q.

Calculate the mass of glucose and the mass of water required to make 500g solution which contains 25% glucose.

1. Mass of glucose = 100g, Mass of water = 375g

2. Mass of glucose = 100g, Mass of water = 350g

3. Mass of glucose = 125g, Mass of water = 375g

4. Mass of glucose = 125g, Mass of water = 350g

Q.

A solution contains 30ml of ethyl alcohol mixed with 100ml of water. What is the concentration of the solution in terms of volume by volume percentage?

1. 23.00%

2. 23.33%

3. 23.07%

4. 23.99%

Q. To make a saturated solution, 15 g of sodium chloride is dissolved in 85 g of water at 293 K. Calculate the concentration in terms of mass by mass percentage at this temperature.

1. 15%
2. 24%
3. 20%
4. 21%

Q.

A solution contains 'X' ml of ethyl alcohol mixed with 100ml of water. The concentration of the solution is 28.6% in terms of volume by volume percentage. Find X.

1. 50ml

2. 40ml

3. 30ml

4. 20ml