What is pOH of a solution? How is it related to its pH value?

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Solution

The pOH of a solution may be defined as the negative logarithm of its OH^– ion concentration.

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Relation between pH and pOH:

We space know comma space space open square brackets straight H subscript 3 straight O to the power of plus close square brackets space open square brackets OH to the power of minus close square brackets space equals space straight K subscript straight w space equals space 1 space cross times space 10 to the power of negative 14 end exponent

Taking logarithm on both sides,

log space open square brackets straight H subscript 3 straight O to the power of plus close square brackets space space plus space log space open square brackets OH to the power of minus close square brackets space equals space log space left parenthesis 1 space cross times space 10 to the power of negative 14 end exponent right parenthesis log space open square brackets straight H subscript 3 straight O to the power of plus close square brackets space plus space log space open square brackets OH to the power of minus close square brackets space equals space minus 14 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space open square brackets because space log space 10 space equals space 1 close square brackets or space space space space space space minus log space open square brackets straight H subscript 3 straight O to the power of plus close square brackets space minus space log space open square brackets OH to the power of minus close square brackets space space equals space 14 or space space space space space space space space space space space space space space space space space space pH space plus space pOH space equals space 14 space space space space space space space space space space space space space space

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Equilibrium

What is pOH of a solution? How is it related to its pH value?

Some More Questions From Equilibrium Chapter

Give two examples of physical equilibrium.

What kind of molecules in a liquid can evaporate?

Name the factors on which vapour pressure of any liquid depends.

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?

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