Concentration of a Solution

Q.

Mass percentage of a solution containing 10 g of solute in 100 g of water is 10%.

1. True

2. False

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. Which of the following represents the mass of glucose and mass of water required to make 250g solution which contains 25% glucose.

1. Mass of glucose = 62.5 g
2. Mass of water = 375 g
3. Mass of glucose = 75 g
4. Mass of water = 187.5 g

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.

Find the concentration of solution in terms of weight percent if 10gm of common salt is dissolved in 40gm of water.

1. 15%

2. 33.33%

3. 20%

4. 25%

Q.

A$10\%$salt solution means that

1. $10\mathrm{gm}$ of salt is present in $100\mathrm{gm}$ of water

2. $10\mathrm{gm}$ of salt is present in $90\mathrm{gm}$ of water

Q. Which of the following formulas are correct?

1. $MassPercent$ = $\frac{MassofSolute}{MassofSolute+MassofSolvent}\times 100$
2. $MassPercent$ =$\frac{MassofSolute}{MassofSolvent}\times 100$
3. $VolumePercent$ = $\frac{VolumeofSolute}{VolumeofSolute+VolumeofSolvent}\times 100$
4. $VolumePercent$ = $\frac{VolumeofSolute}{VolumeofSolvent}\times 100$

Q.

36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.

Q. A solution contains 60 g of common salt in 540 g of water. Find the concentration in terms of mass by mass percentage of the solution.

Q.

A solution contains $40\mathrm{g}$of common salt in $320\mathrm{g}$ of water. Calculate the concentration in terms of mass percentage of the solution by mass.

Q.

Is the following statement correct?

Mass percentage of a solution containing 10g of solute in 100g of water is 10%.

Q. The concentration (w/w%) of a 200 g solution of common salt is 10%. If 20 g more water is mixed in it then its concentration becomes

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. 22.00%

2. 25.66 %

3. 23.00 %

4. 23.07 %

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

Q. The amount of solute present in a given amount of solution represents:

1. concentration
2. saturation
3. absorption
4. dispersion

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. 20ml

2. 28.6ml

3. 40ml

4. 30ml

Q.

$180$g of $30\%(\mathrm{w}/\mathrm{w})$ $\mathrm{NaOH}$ is prepared. Calculate the volume of water utilised if the density of water is $0.9\mathrm{g}/\mathrm{cc}$.

1. $130$mL

2. $140$mL

3. $125$mL

4. $135$mL