1.

The pH of pure water at 50^@ C is (K_w -13.26 at 50^@ C)

Answer»

`7.0`
`7.13`
`6.0`
`6.63`

SOLUTION :`PH = 1/2PK_w`( forpurewater)
pH= `1/2xx13.26 = 6.63`


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