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Standard XII

Physics

Time Period Independent of Amplitude

For a weak ac...

Question

For a weak acid HA, Ostwald's dilution law is represented by the equation______

K_{a} = \frac{α c}{1 - α^{2}}

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K_{a} = \frac{α^{2} c}{1 - α}

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α = \frac{K_{a} c}{1 - c}

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K_{a} = \frac{α^{2} c}{1 - α^{2}}

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Solution

The correct option is A $K_{a} = \frac{α^{2} c}{1 - α}$
Mathematical form of Oswald's dilution law represented by option B.

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Similar questions

If $α$ is the degree of ionization, $C$ the concentration of a weak electrolyte and $K_{a}$ the acid ionization constant, then the correct relationship between $α$ , Cand $K_{a}$ is

The degree of dissociation of weak electrolyte is inversely proportional to the square root of concentration. It is called Ostwald's dilution law.

α = \sqrt{\frac{K_{a}}{c}}

, as the temperature increases, degree of dissociation will increase

\frac{α_{1}}{α_{2}} = \sqrt{\frac{K_{a_{1}}}{K_{a_{2}}}}

, if concentration is same

\frac{α_{1}}{α_{2}} = \sqrt{\frac{c_{2}}{c_{1}}}

, if acid is same

a_{1}

and

a_{2}

are in ratio of

1 : 2, K_{a_{1}} = 2 \times 10^{- 4}

. What will be

K_{a_{2}}

The degree of dissociation of weak electrolytes is inversely proportional to the square root of concentration. It is called Ostwald's dilution law.

α = \sqrt{\frac{K_{a}}{c}}

As the temperature increases, degree of dissociation will increase

\frac{α_{1}}{α_{2}} = \sqrt{\frac{K_{a_{1}}}{K_{a_{2}}}}

If concentration is same

\frac{α_{1}}{α_{2}} = \sqrt{\frac{c_{2}}{c_{1}}}

If acid is same

0.01 M

C H_{3} C O O O H

has

4.24 %

degree of dissociation, the degree of dissociation of

0.1 M

C H_{3} C O O O H

will be

Q. For a real number

α

, if the system

⎡ ⎢ ⎣ \begin{matrix} 1 & α & α^{2} α & 1 & α α^{2} & α & 1 \end{matrix} ⎤ ⎥ ⎦ ⎡ ⎢ ⎣ \begin{matrix} x y z \end{matrix} ⎤ ⎥ ⎦ = ⎡ ⎢ ⎣ \begin{matrix} 1 - 1 1 \end{matrix} ⎤ ⎥ ⎦

of linear equations, has infinitely many solutions, then

1 + α + α^{2} = ?

Q. For a real number

α

, if the system

⎡ ⎢ ⎣ \begin{matrix} 1 & α & α^{2} α & 1 & α α^{2} & α & 1 \end{matrix} ⎤ ⎥ ⎦ ⎡ ⎢ ⎣ \begin{matrix} x y z \end{matrix} ⎤ ⎥ ⎦ = ⎡ ⎢ ⎣ \begin{matrix} 1 - 1 1 \end{matrix} ⎤ ⎥ ⎦

of linear equations, has infinitely many solutions, then

1 + α + α^{2} =

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For a weak acid HA, Ostwald's dilution law is represented by the equation______

The correct option is A Ka=α2c1−αMathematical form of Oswald's dilution law represented by option B.

The correct option is A $K_{a} = \frac{α^{2} c}{1 - α}$
Mathematical form of Oswald's dilution law represented by option B.