Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 189

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Concentration of ${CH}_{3} {COO}^{-}$ is $0.001 M$ , when $0.1 moles$ of ${CH}_{3} COOH$ were dissolved in $1 L$ water. $K_{a}$ of ${CH}_{3} COOH$ is:

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Important Questions on Equilibrium

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 190

For two weak acids

A

and

B

, the ratio of their percent ionization is

4 : 9

. The ratio of their

K_{a}

would be:

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 191

For diprotic acid

H_{2} S

, which is the best way to represent its ionisation in water?

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 192

The ionization constant of a tribasic acid is

K_{a} .

If it's first, second and third ionization constant are

K_{a_{1}}

, K_{a_{2}}

and

K_{a_{3}}

, respectively then:

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 193

What will be the

pH

of a

0.01 M H_{3} {PO}_{4}

solution having

[{PO}_{4}^{3 -}] = 10^{- 5} M

?

[K_{a_{1}} = 10^{- 4}, K_{a_{2}} = - 10^{- 6}, K_{a_{3}} = 10^{- 8}]

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 194

K_{a}

for a weak acid

HA

is

1.44 \times 10^{- 5}

. What is the concentration of

A^{-}

when

0.01 mole

of

HA

is dissolved in

1 L

of

0.01 M

HCl

solution?

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 195

When a salt

' X'

is dissolved in water at

pH = 7,

the resulting solution becomes alkaline in nature. Salt

' X'

is made up of?

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 196

The salt that when added to water will not change its

pH

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 1>Q 197

The most acidic aqueous solution is: