Common Ion Effect

Q. MY and NY3, two nearly insoluble salts, have thesame KSP values of 6.2× 10-13 at roomtemperature. Which statement would be true in regard to my & ny3 (1) The addition of the salt of KY to solution of MYand NY3 will have no effect on their solubilities (2) The molar solubilities of MY and NY3, in water are identical (3) The molar solubility of MY in water is less than NY3(4) The salts MY and NY3, are more soluble in 0.5 M KY than in pure water

Q.

Precipitation requires

1. Ionic product to be less than solubility product

2. Ionic product to be equal to solubility product

3. Ionic product to be more than solubility product

4. Ionic product to be more than pH

Q. how to find out equivalent weight? What is the equivalent weight of hydrogen ?

Q. the percentage strength of solution obtained by mixing equal volumes of two peroxide solutions of "10 volume" and "20 volume strength is

Q.

What does completely ionized mean?

Q. Arrange CaCO₃, KHCO₃, NaHCO₃, Na₂CO₃ in increasing order of solubility and explain the reason for the arrangement.

Q. Ag2CrO4 and Ag2C2O4 both are present in a saturated solution in water .Ksp of Ag2CrO4 and Ag2C2O4 are 2x10ⁿ(where n =-12) and 2x10ⁿ(where n= -11) respectively, what is (Ag+) in solution? 1)3.53x10-4. 2)3.53x10-2. 3)3.53x10-5. 4)3.53x10-3

Q.

What is ionisation used for ?

Q. Factors that affect degree of ionisation include :

1. Dilution
2. Presence of other solutes
3. Nature of electrolyte
4. Nature of solvent

Q. 71.Number of gram equivalents of H2SO4 present in 200 mL of M/10 H2So4 solution.

Q. For an aqueous solution of a weak electrolyte $C{H}_{3}COOH$, how does the presence of $C{H}_{3}COONa$ affect its degree of ionisation?

1. The degree of ionisation remains same.
2. The degree of ionisation decreases.
3. The degree of ionisation increases.
4. $C{H}_{3}COOH$ acts as a strong acid.

Q. What will be the normality of a solution obtained by mixing 0.45 N and 0.60 N NaOH in the ratio 2:1 by volume? (a) 0.4 N (b) 0.5 N (c) 1.05 N (d) 0.15 N

Q. The solubility of a salt of weak acid (AB) at pH 3 is Y×10^{-3} mol L^{-1} . The valcue of Y is__________. (Given that the value of solubility product of AB (K_{sp}) =2×10^{-10} and the value of ionization cons†an t of HB (K_a) =1×10^{-8_{}}

Q. Which of the following is/are true about an electrolyte solution at infinite dilution?

${\Lambda }_m$ is molar conductivity
${\Lambda }_m^0$ is limiting molar conductivity

1. All interionic effects of electrolyte disappears
2. $\text{Degree of dissociation of weak electrolyte,}\alpha =1$
3. ${\Lambda }_m^0$ of an electrolyte is the sum of the individual contributions of cation and anion of the electrolyte.
4. All of the above.

Q. Which of the following is a polyprotic acid?

1. $H_{2}S{O}_4$
2. $H_{2}C{O}_3$
3. $H_2{C}_2{O}_4$
4. All of the above.

Q. 29. The number of gram equivalents of H3PO4 present in its 0.1 molar 250 ml solution is

Q.

Why is it necessary to use acetic acid and not sulphuric acid for acidification of sodium extract for testing sulphur by lead acetate test?

Q. Discuss the principle and method of softening of hard water by synthetic ion-exchange resins.

Q. Why in FeO and FeO3 fe mass of Fe is taken in parts

Q. The dissociation constant of $0.05MC{H}_{3}COOH$ is given as $1.8\times {10}^{-5}$. The percentage dissociation of $C{H}_{3}COOH$ in $0.2MHCl$ solution is $x\times {10}^{-3}\%$. Find the value of $x$.

Q. Find the density (in gm/ml) of a 3.6M sulphuric acid solution that is 29% H2SO4 by mass ?

Q. Which of the following statement(s) is/are correct ?

${\Lambda }_m$ - Molar conductivity
${\Lambda }_m^0$ - Limiting molar conductivity
$C$ - concentration of electrolyte

1. Variation of molar conductivity for strong electrolyte is given by,
   ${\Lambda }_m={\Lambda }_m^0-A\sqrt{C}$
2. Molar conductivity of a strong electrolyte increases with dilution
3. Molar conductivity of a strong electrolyte decreases with dilution
4. ${\Lambda }_m^0$ for a strong electrolyte can be found from the plot of ${\Lambda }_{m}vs\sqrt{C}$by extrapolation of ${\Lambda }_m$ to zero concentration

Q.

Which one of the following is the correct representation of the solubility of SnS₂?

1. [Sn²⁺][S²]²

2. [Sn⁴⁺][ S^2-]²

3. [Sn²⁺]³[S²]

4. [Sn⁴⁺]²[S²]

Q.

differentciate between solubility and ionic product

Q. What is the pH of the solution when 0.2 mole of hydrochloric acid is added to one litre of a solution containing 1 M acetic acid and acetate ion? Assume that the total volume is one litre. $K_a$ for ${\text{CH}}_3\text{COOH}=1.8\times {10}^{-5}$

1. 4.58
2. 9.16
3. 7
4. 2.37

Q. What effect does the concentration of $H^{+}$ (aq) have on the acidic nature of solution?

Q.

The solubility of Sr(OH)₂ at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.

Q. Which of the following represent the plot of ${\Lambda }_m$ vs $\sqrt{C}$ for a strong electrolyte ($KCl$)?

${\Lambda }_m$ - Molar conductivity
$C$ - concentration of electrolyte

1. 
2. 
3. 
4. 

Q.

The solubility of Sr(OH)₂ at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.

Q. 25. 100 ml 0.1 M Ba(OH)2 solution is mixed with V ml X M H2SO4. The number of millimoles of BaSO4 ppt is 8 . Find V and X