Ways of Representing the Concentration of a Solution

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

4. (i), (ii), (v)

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

Q.

A solution contains 50g of common salt in 400g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

1. 9.7%

2. 9.99%

3. 11.11%

4. 11.50%

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

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. 23.07%

3. 23.33%

4. 23.99%

Q.

A solution contains y ml of acetone in 150ml of solution. The concentration of the solution is $25\%$ in terms of volume by volume percentage. Find y.

1. 50

2. 40

3. 30

4. 20

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. 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.

The formula for calculating concentration is given by which of the following:

(i) $\frac{massofsolute}{massofsolution}\times 100$

(ii) $\frac{massofsolute}{massofsolute+solvent}\times 100$

(iii) $\frac{massofsolvent}{massofsolution}\times 100$

(iv) $\frac{massofsolvent}{massofsolute+solvent}\times 100$

(v) $\frac{massofsolute}{volumeofsolution}\times 100$

(vi) $\frac{massofsolvent}{volumeofsolution}\times 100$

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

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

3. (iv), (iii), (vi)

4. (iv), (iii), (v)

Q. The concentration of a solution is the amount of __________ present per unit volume of the solution.

1. unsaturated solution
2. solute
3. solution
4. solvent