A wastewater sample contains 10-5.6 mmol/l of OH ions at 25° C. The pH of this sample is-A-8.6B-8.4C-5.6D-5.4-D-5.4

Question

A wastewater sample contains 10-5.6 mmol/l of OH ions at 25&deg; C. The pH of this sample is-A-8.6B-8.4C-5.6D-5.4-D-5.4

APTITUDE CRACK · Accepted Answer

D 5.4 poh = 8.6. As the mmol will change to mole per lit; therefore as we know; pH + pOH = 14. pH + 8.6 = 14. pH = 14 8.6 = 5.4.

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