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Equilibrium

Question
CBSEENCH11006585
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The ionisation constant of nitrous acid is 4·5 × 10–4. Calculate the pH of 0·04M sodium nitrite solution and also its degree of hydrolysis.

Solution
Sodium nitrite is a salt of a strong base and a weak acid. Its degree of hydrolysis, h is given by the relation:
straight h space equals space square root of fraction numerator straight K subscript straight w over denominator straight K subscript straight a space cross times space straight C end fraction end root space equals space square root of fraction numerator 1 space cross times space 10 to the power of negative 14 end exponent over denominator 4.5 space cross times space 10 to the power of negative 4 end exponent space cross times space 0.04 end fraction end root space space space equals space space square root of 5.56 space cross times space 10 to the power of negative 10 end exponent end root space space space equals space 2.36 space cross times space 10 to the power of negative 5 end exponent space space We space know comma space
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Some More Questions From Equilibrium Chapter

Which measurable property becomes constant in water vapour equilibrium?

Give an example from daily life in which there is gas solution equilibrium?

A crystal of common salt of a given mass is kept in its aqueous solution. After 24 hours, its mass remains the same. Is the crystal in equilibrium with the solution?

What is the role of forward and backward reactions at equilibrium of a reversible reaction?

What is a forward reaction?

What condition favours a reversible reaction?

What is a backward reaction?

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