Q.
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a
Molar concentration of hydronium ion expressed in base 10 logarithmic scale is called PH scale.
b
PH of solution is the negative logarithm in base 10 of H+ ion activity aH+, numerical value of molarity of solution.
c
PH = -log10aH+=-logH+mol L-1
d
H3O+×OH- is 10-14 M2 for any aqueous solution at any temperature.
answer is D.
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