Chemistry · JEE

Important Questions: Ionization of water, pH scale, common ion effect, hydrolysis of salts and pH of their solutions, the solubility of sparingly soluble salts, solubility products and buffer solutions for JEE

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Q1ChemistryUnit 6: Equilibrium

K_{a}

for acetic acid in water is

1.7 \times

10^{-5}

25^{\circ} \mathrm{C} .

The

\mathrm{pH}

of a mixture of 25

\mathrm{ml}

0.02 \mathrm{N}

acetic acid and

2.5 \mathrm{ml}

of 0.1N NaOH (neglecting volume change) will be

(\log 1.7=0.23)

Q2ChemistryUnit 6: Equilibrium

Assertion Assertion: A solution of

N H_{4} C l

in water is acidic in nature. Reason Reason : Ammoniun ions undergo hydrolysis to form

N H_{4} O H

Q3ChemistryUnit 6: Equilibrium

1.2 mol of

\boldsymbol{C H}_{3} \boldsymbol{N} \boldsymbol{H}_{2}\left(\boldsymbol{p} \boldsymbol{K}_{\boldsymbol{b}}=\boldsymbol{3} . \boldsymbol{3}\right)

is added to 0.8 moles of

H C l

and the solution is diluted to one litre, resulting

\boldsymbol{p} \boldsymbol{H}

of solution is:

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