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Calculate p...

Question

Calculate $p H$ of $10^{- 10} M$ $N a O H$ solution. (Write the value to the nearest integer).

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Solution

$[{O H}^{-}] = 10^{- 10} + 10^{- 7} = 10^{- 7} [1.001]$
$p O H = 7 - log 1.001 = 6.99$
$p H = 7.0004$

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