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Calculate the hydrogen ion concentration...

Calculate the hydrogen ion concentration from the following pH value :
(iii) 3.2

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(iii) `pH=3.2`
`3.2 =-log [H^+]`
`log [H^+]=-3.2`
`[H^+]=` antilog of `[-4+0.8]`
`=6.31xx10^(-4)`
`[H^+]=6.31xx10^(-4)`
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