Hydrolsis of Salts

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JEE Advanced 2018

LEVELJEE Advanced

Dilution process of different aqueous solutions; with water, are given in List-I. The effects of dilution of the solutions on $[H^{+}]$ are given in List-II. (Note : Degree of dissociation ( $α$ ) of weak acid and weak base is $<< 1$ ; degree of hydrolysis of salt $<< 1$ ; $[H^{+}]$ represents the concentration of $H^{+}$ ions)

List-I

(P)

(10 mL of 0.1 M NaOH + 20 mL of 0.1 M acetic acid) diluted to 60 mL

(Q)

(20 mL of 0.1 M NaOH + 20 mL of 0.1 M acetic acid) diluted to 80 mL

(R)

(20 mL of 0.1 M HCl + 20 mL of 0.1 M ammonia solution) diluted to 80 mL

(S)

10 mL saturated solution of

N i (O H)_{2}

in equilibrium with excess solid

N i (O H)_{2}

is diluted to 20 mL (solid

N i (O H)_{2}

is still present after dilution).

List-II

(1)

the value of

[H^{+}]

does not change on dilution

(2)

the value of

[H^{+}]

changes to half of its initial value on dilution

(3)

the value of

[H^{+}]

changes to two times of its initial value on dilution

(4)

the value of

[H^{+}]

changes to

\frac{1}{2}

times of its initial value on dilution

(5)

the value of

[H^{+}]

changes to

2

times of its initial value on dilution

LEVELBoard

Regular use of which of the following fertilizers increases the acidity of soil ?

Superphosphate of lime

(D)

Ammonium sulphate

LEVELJEE Main

pH of $0.005$ M calcium acetate ( $p K_{a}$ of $C H_{3} C O O H = 4.74$ ) is

On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is

(A)

CH_{3} COOC_{2} H_{5} + NaCl

(B)

CH_{3} COONa + C_{2} H_{5} OH

(C)

CH_{3} COCl + C_{2} H_{5} OH + NaOH

(D)

CH_{3} Cl + C_{2} H_{5} COONa

JEE Main 2018

LEVELJEE Main

Which of the following salts is the most basic in aqueous solution?

(A)

Al(CN)_{3}

(B)

CH_{3} COOK

(C)

FeCl_{3}

(D)

Pb(CH_{3} COO)_{2}

JEE Main 2019

LEVELJEE Main

The pH of a $0.02 M NH_{4} Cl$ solution will be [Given $K_{b} (NH_{4} OH) = 1 0^{- 5}$ and $lo g 2 = 0.301$ ]

Arrange the following solutions in the decreasing order of pOH. (A) $0.01 M HCl$ (B) $0.01 M NaOH$ (C) $0.01 M CH_{3} COONa$ (D) $0.01 M NaCl$

(A)

(A) > (C) > (D) > (B)

(B)

(A) > (D) > (C) > (B)

(C)

(B) > (C) > (D) > (A)

(D)

(B) > (D) > (C) > (A)

JEE Main 2017

LEVELBoard

$p K_{a}$ of a weak acid (HA) and $p K_{b}$ of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is

The pH of ammonium phosphate solution, if $p K_{a}$ of phosphoric acid and $p K_{b}$ of ammonium hydroxide are 5.23 and 4.75 respectively, is ......... .

LEVELJEE Main

The $p K_{a}$ of a weak acid, HA is 4.80. The $p K_{b}$ of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be

List-I

List-II

Regular use of which of the following fertilizers increases the acidity of soil ?

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } pH of 0.005 M calcium acetate (pKa​ of CH3​COOH=4.74) is

On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is

Which of the following salts is the most basic in aqueous solution?

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The pH of a 0.02 M NH4​Cl solution will be [Given Kb​(NH4​OH)=10−5 and log2=0.301]

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Arrange the following solutions in the decreasing order of pOH. (A) 0.01 M HCl (B) 0.01 M NaOH (C) 0.01 M CH3​COONa (D) 0.01 M NaCl

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } pKa​ of a weak acid (HA) and pKb​ of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The pH of ammonium phosphate solution, if pKa​ of phosphoric acid and pKb​ of ammonium hydroxide are 5.23 and 4.75 respectively, is ......... .

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The pKa​ of a weak acid, HA is 4.80. The pKb​ of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be

pH of $0.005$ M calcium acetate ( $p K_{a}$ of $C H_{3} C O O H = 4.74$ ) is

The pH of a $0.02 M NH_{4} Cl$ solution will be [Given $K_{b} (NH_{4} OH) = 1 0^{- 5}$ and $lo g 2 = 0.301$ ]

Arrange the following solutions in the decreasing order of pOH. (A) $0.01 M HCl$ (B) $0.01 M NaOH$ (C) $0.01 M CH_{3} COONa$ (D) $0.01 M NaCl$

$p K_{a}$ of a weak acid (HA) and $p K_{b}$ of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is

The pH of ammonium phosphate solution, if $p K_{a}$ of phosphoric acid and $p K_{b}$ of ammonium hydroxide are 5.23 and 4.75 respectively, is ......... .

The $p K_{a}$ of a weak acid, HA is 4.80. The $p K_{b}$ of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be