here first you have to calculate the concentration of the
molar mass of = 129.59 g/mol
so 1.50g of = mole = 0.0116 moles of
so the concentration of the solution = = 0.0116 M
along with this we need to know the value of (since the above mentioned salt is an acidic salt, derived from weak base and strong acid , so it will show acidic character and thus we are calculating the value)
we can get that using the equation
*
thus = ;
of = 7.4 × 10−10 (got this value from book)
10-14 (for water)
= = 1.35 * 10-4
rest of the answer is given in the image:
The answer is option B
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