Q. 85.0( 3 Votes )

The water acidity

Answer :

Given,


First reading = 8.48


Second reading = 8.35


Let the third reading be ‘x’


Now, average pH should be between 8.2 and 8.2


Average pH


Multiplying by 3, we get


24.6 < 16.83 + x < 25.5


Subtracting 16.83, we get


7.77 < x < 8.67


Hence, third pH reading should be between 7.77 and 8.67


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