Ways of Representing the Concentration of a Solution

Q. Question 9
Which of the following will show “Tyndall effect”?
a. Salt solution
b. Milk
c. Copper sulphate solution
d. Starch solution

Q.

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

Q. Calculate the concentration in terms of mass by volume percentage of the solution containing, $3\text{g}$ of potassium chloride in $75\text{ml}$ of potassium chloride $\left(KCl\right)$ solution.

1. $4\%$
2. $6\%$
3. $8\%$
4. $20\%$

Q.

The mole fraction of component A in the vapour phase is $x_1$ and mole fraction of component A in liquid mixture is $x_2(P_A^0$= vapour pressure of pure A; $P_B^0$ = vapour pressure of pure B).

1. $\frac{\left(P_A^{\circ }{x}_2\right)}{x_1}$

2. $\frac{P_A^{\circ }{x}_1}{x_2}$

3. $\frac{P_A^{\circ }{x}_1}{x_2}$

4. $\frac{P_B^{\circ }{x}_2}{x_1}$

Q.

Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.

Q.

What is ${}^{6}C_4$ combination?

Q.

The molarity of NaNO3 is1 M. The density of solution is 1.25g/ml. Calculate molality of solution. Molar mass of NaNO3= 85g

Q.

What are non-aqueous solutions? Explain with example.

Q. 80 ml of a solution contains 20 g of solute. What is the concentration of this solution in terms of mass by volume percentage of the solution?

1. 25%
2. 50%
3. 100%
4. 400%

Q. Definition of concentrated solution

Q.

What is dilute solution?

Q.

What do you mean by the strength of a solution?

Q.

The boiling point of water at 735 torr is 99.07°C. The mass of NaCl added in 100g water to make its boiling point 100°C is?(k=0.51 k kg/mol)

Q.

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

Q.

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

Q.

A solution containing 30 grams of sugar dissolved in 370 grams of water. Calculate the concentration of the solution.

Q.

What is the concentration of a solution which contains 16 g of urea in 120 g of solution?

Q.

A solution made by dissolving 50gm of glucose in 250gm of water. Calculate the concentration of this solution in mass?

Q.

Calculate the mass of sodium sulphate required to prepare its 20% (mass %) solution in hundred grams of water

Q.

Define volume percent of a solution.

Q.

A 5 per cent sugar solution means that :

(a) 5 g of sugar is dissolved in 99 g of water.

(b) 5 g of sugar is dissolved in 100 g of water.

Choose the correct answer.

Q. The molarity of sulphuric acid solution is 0.2 mol/kg. Calculate the weight of the solution

Q. A molecule M associates in a given solvent according to the equation M=(M)n. For a certain concentration of M , the vont hoff factor was found to be 0.9 and the fraction of associated molecules was 0.2 . The value of n is

Q.

How much water should be mixed with 12 ml of alcohol so as to obtain $12\%$ alcohol solution?

Q. Mole fraction of ethanol and water mixture is 0.25 . Hence percentage concentration of ethanol by weight of mixture is........

Q.

The solubility of ammonium chloride in water at various temperatures is given below :

Temperature : ${10}^{\circ }C{20}^{\circ }C{40}^{\circ }C{60}^{\circ }C{80}^{\circ }C$

Solubility : 24 g 37 g 41 g 55 g 66 g

What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at ${40}^{\circ }C?$

Q.

What volume of ethyl alcohol and water must be mixed together to prepare 250 ml of 60% by volume of alcohol in water

Q.

How much water should be added to 15g of salt to obtain 15%salt solution?

Q.

A Solution is prepared by dissolving 5 g of urea in 95 g of water . What is mass by mass percentage of urea in the solution ?

Q.

The molarity of HNO₃ in a sample which has density 1.4 g/mL and mass percentage of 63% is :(Molecular weight of HNO₃= 63).