Answer to Question #175314 in General Chemistry for Agne Daugintyte

Question

(a)   A 25.0 cm³ sample of 0.25 mol dm^-3 nitric acid solution is titrated with 0.10 mol dm^-3 sodium hydroxide. Calculate the pH of the solution -

(i)         Before any sodium hydroxide has been added

(ii)        After the addition of 10.0 cm³ sodium hydroxide

(iii)       After the addition of 25.0 cm³ sodium hydroxide

(iv)       After the addition of 50.0 cm³ sodium hydroxide

(v)        After the addition of 62.5 cm³ sodium hydroxide

(vi)       After the addition of 75.0 cm³ sodium hydroxide

(vii)      After the addition of 100.0 cm³ sodium hydroxide

Answer 1

Cocentration of the acid = 0.25M

PH before NaOH added = -log 0.25 = 0.6