Answer to Question #5424 in Chemistry for angie

Question #5424

calculate the pH of a solution formed by mixing 40ml of 0.1M HCL with 60 ml of water.

Expert's answer

m(HCl)=0,1mol\L*36,5g\mol*0,04L=0,146g;
C(HCl)=0,146g : (36,5g\mol*(0,04L+0,06L))=0,04M=0,04mol\L;
For water [H+] = (Kw)1/2 = 10-7 mol\L.
Then, pH = - lg[H+] = - lg(10-7 +4*10-2) = 1,4.
pH = 1,4.

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