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Suggest a way to determine the A^@m valu...

Suggest a way to determine the `A^@m` value of water.

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`wedge_(m)^(@)(H_(2)O)=lamda_(H^(+))^(@)+lamda_(OH)^(@-)`
We find out `wedge_(m)^(@)(HCl),wedge_(m)^(@)(NaOH) and wedge_(m)^(@)(NaCl)`. Then
`wedge_(m)^(@)(H_(@)O)=wedge_(m)^(@)(HCl)+wedge_(m)^(@)(NaOH)-wedge_(m)^(@)-wedge_(m)^(@)(NaCl)`
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  20. Suggest a way to determine the A^@m value of water.

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