Chemistry Crash Course JEE Advanced>Chapter 7 - Equilibrium>Exercise 1>Q 51

EASY

Chemistry

IMPORTANT

Earn 100

Calculate the $pH$ of a solution which has a hydronium-ion concentration of $6 \times 10^{- 8} M$ .

Give answer after multiplying with 100 and rounding off to the nearest integer value.

50% studentsanswered this correctly

Important Questions on Equilibrium

MEDIUM

Chemistry

IMPORTANT

Chemistry Crash Course JEE Advanced>Chapter 7 - Equilibrium>Exercise 1>Q 52

The

pH

of a white-vinegar solution is

2.45 .

This vinegar is an aqueous solution of acetic acid with a density of

1.09 g / mL

. What is the mass percentage of acetic acid in the solution?

K_{a} ({CH}_{3} COOH = 1.7 \times 10^{- 5})

(answer to the nearest integer)

HARD

Chemistry

IMPORTANT

Chemistry Crash Course JEE Advanced>Chapter 7 - Equilibrium>Exercise 1>Q 53

In how many litres of water,

10 g

of

{CH}_{3} COOH

should be dissolved to give

[H^{+}] = 10^{- 3} ? K_{a} ({CH}_{3} COOH) = 1.8 \times 10^{- 5} ?

HARD

Chemistry

IMPORTANT

Chemistry Crash Course JEE Advanced>Chapter 7 - Equilibrium>Exercise 1>Q 54

A

2.5 gm

impure sample containing weak mono-acidic base

(Mol .

wt.

= 45)

is dissolved in

100 ml

water and titrated with

0.5 M HCl

when

{(\frac{1}{5})}^{th}

of the base was neutralized the

pH

was found to be

9

and at equivalent point

pH

of solution is

4.5

. Given: All data at

25 ° C & \log 2 = 0.3

. Find the concentration of salt in

mol / {dm}^{3}

at equivalence point.

MEDIUM

Chemistry

IMPORTANT

Chemistry Crash Course JEE Advanced>Chapter 7 - Equilibrium>Exercise 1>Q 55

For a reversible reaction, the rate of backward reaction is

150

times the rate of forward reaction at an instant, at

27 ° C . Δ_{r} G

at this stage of reaction (in

kcal / mol

) is [Given

\ln 50 = 3.91, \ln 3 = 1.09

and

R = 2 cal / K / mol]