The mole fraction of the solute in a 1.00 molal aqueous solution is:
1. | 0.00177 | 2. | 0.0344 |
3. | 0.0177 | 4. | 0.1770 |
1. 1.5 M
2. 1.66 M
3. 0.017 M
4. 1.59 M
25.3 g of sodium carbonate, Na2CO3, is dissolved in enough water to make 250 mL of a solution. If sodium carbonate completely dissociates, the molar concentrations of sodium ion, Na+ and carbonate ion, are respectively:
(molar mass of Na2CO3 = 106g mol-1)
1. 0.955 M and 1.910 M
2. 1.910 M and 0.955 M
3. 1.90 M and 1.910 M
4. 0.477 M and 0.477 M
If 4 g of NaOH dissolves in 36 g of H2O, the molarity of the solution is: (specific gravity of solution is 1 g mL-1) :
1. | 3 M | 2. | 3.5 M |
3. | 2.5 M | 4. | 2 M |
The density of a 2 M aqueous solution of NaOH is 1.28 g/. The molality of the solution is:
[molecular mass of NaOH = 40 ]
1. | 1.20 m | 2. | 1.56 m |
3. | 1.67 m | 4. | 1.32 m |
The molality of a 20% (by mass) CaCO3 solution is :
(Given: Density of solution is 1.2 gm/ml)
1. | 1.25 m | 2. | 2.5 m |
3. | 2.08 m | 4. | 1.5 m |
The total molarity of all the ions present in 0.1 M of CuSO4 and 0.1 M of Al2(SO4)3 solution is:
1. 0.2M
2. 0.7M
3. 0.8M
4. 1.2M