Question

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0140 M solution. The pH of the resulting solution is 2.50. Calculate the Ką for the acid. Ka =

Answer 1

Dear student,

we have PH of the solution which gives us H+ concentration from there we are going to get Ka from the initial concentaraion and assuming a change of x for the reaction, the question is solved below.If something is not clear or need further clarification please feel free to comment here without hesitation.

mono protic acid (x ) let be the acid] which gives one proton (ht) HX - * * коъ Сңіх Hx] oo Initial 0.014 change as ts to ol4-30) seca Equilli brium we know, H+ = 10mph 10-2.5 0.00316231 = 3.1623 Xlo N C ta [47] [x] 3.1823x103 3. 1623X10²3 Cooly-0.0031623)

ко – Ч. 2 21 x 16" • зал че" |