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Lewis Theory

Value of diss...

Question

Value of dissociation constant of acetic acid is $10^{- 6}$ , where as dissociation constant of formic acid is $10^{- 5}$ . Which of the following will be the value of $p K a$ (acetic acid) - $p K a$ (formic acid)?

10

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+ 1

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10^{- 1}

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- 1

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Solution

The correct option is A $+ 1$
$K_{a}$ (acetic acid) $= 10^{- 6} ⟶ p K_{a} = - l o g (10^{- 6}) = 6$ (acetic acid)

$K_{a}$ (Furmic acid) $= 10^{- 5} ⟶ p K_{a} = - l o g (10^{- 5} = 5$ (formic)

$p K_{a}$ (acetic acid) $- p K_{a}$ (furmic acid) $= 6 - 5 = 1$

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Similar questions

Value of dissociation constant of acetic acid is $10^{- 6}$ , where as dissociation constant of formic acid is $10^{- 5}$ . Which of the following will be the value of pK $_{a}$ (acetic acid) - pK $_{a}$ (formic acid)
a)10
b)1
c) $10^{- 1}$
d)-1

Q. The conductivity of

0.001 M

acetic acid is

5 \times 10^{- 2} S c m^{- 1}

and

\land^{\infty}

390.5 S c m^{2} m o l^{- 1}

then the calculated value of dissociation constant of acetic acid would be:

Q. The conductivity of

0.00241 M

acetic acid is

7.896 \times 10^{- 5} S {c m}^{- 1}

and

Λ^{\infty}

390.5 S {c m}^{2} {m o l}^{- 1}

than the calculated value of dissociation constant of acetic acid would be :

Q. The conductivity of

1 \times 10^{- 3}

M acetic acid is

5 \times 10^{- 5} S c m^{- 1}

and

Λ^{o}

is 390.5

S c m^{2} m o l^{- 1}

. The dissociation constant of acetic acid is:

Q. If the degree of dissociation of acetic acid

(C H_{3} C O O H)

in a

0.9 M

solution is

4.5 \times 10^{- 3}

. Then, its

p K_{a}

value will be:

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Value of dissociation constant of acetic acid is 10−6, where as dissociation constant of formic acid is 10−5. Which of the following will be the value of pKa (acetic acid) - pKa (formic acid)?

The correct option is A +1Ka (acetic acid)=10−6⟶pKa=−log(10−6)=6 (acetic acid)Ka (Furmic acid)=10−5⟶pKa=−log(10−5=5 (formic)pKa (acetic acid) −pKa (furmic acid) =6−5=1

Value of dissociation constant of acetic acid is $10^{- 6}$ , where as dissociation constant of formic acid is $10^{- 5}$ . Which of the following will be the value of $p K a$ (acetic acid) - $p K a$ (formic acid)?

The correct option is A $+ 1$
$K_{a}$ (acetic acid) $= 10^{- 6} ⟶ p K_{a} = - l o g (10^{- 6}) = 6$ (acetic acid)

$K_{a}$ (Furmic acid) $= 10^{- 5} ⟶ p K_{a} = - l o g (10^{- 5} = 5$ (formic)

$p K_{a}$ (acetic acid) $- p K_{a}$ (furmic acid) $= 6 - 5 = 1$