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Equilibrium

Question
CBSEENCH11006537
Wired Faculty App

Assuming complete dissociation, calculate the pH of the following solution:
0.005M NaOH

Solution

0.005 M NaOH:
Since NaOH is completely dissociated,
therefore space space space space open square brackets OH to the power of minus close square brackets space equals space 0.005 space straight M space equals space 5 space cross times space 10 to the power of negative 3 end exponent straight M Also space space space open square brackets straight H to the power of plus close square brackets space open square brackets OH to the power of minus close square brackets space equals space 1 space cross times space 10 to the power of negative 14 end exponent therefore space space space space space open square brackets straight H to the power of plus close square brackets space equals space fraction numerator 1 space cross times space 10 to the power of negative 14 end exponent over denominator open square brackets OH to the power of minus close square brackets end fraction space equals space fraction numerator 1 space cross times space 10 to the power of negative 14 end exponent over denominator 5 space cross times space 10 to the power of negative 3 end exponent end fraction space space space space space space space space space space space space space space space space equals space 2 space cross times space 10 to the power of negative 12 end exponent straight M
therefore space space space pH space equals space minus log space open square brackets straight H to the power of plus close square brackets space space space space space space space space space space space equals space minus log space open square brackets 2 space cross times space 10 to the power of negative 12 end exponent close square brackets space space space space space space space space space space space equals space minus open square brackets log space 2 space plus space log space 10 to the power of negative 12 end exponent close square brackets space space space space space space space space space space space equals negative open square brackets 0.3010 space minus space 12 close square brackets space space space space space space space space space space space equals space 11.6990 space asymptotically equal to space 11.70 space space space space space space space space space space space space space space space space space space space space space

Some More Questions From Equilibrium Chapter

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?

What type of equilibrium is attained in a reversibe chemical change?

What is meant by a system at dynamic equilibrium?

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