The waste water of a certain large colony contains 10-5.6 m mol/l of O – McqOptions

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1.	The waste water of a certain large colony contains 10-5.6 m mol/l of OH- ions at 25° C. The pH of this sample is
A.	8.6
B.	7.9
C.	5.4
D.	4.5
Answer» D. 4.5

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