Answer to Question #113508 in General Chemistry for Jonathan Jacques Pluviose

Question

If a 7.5 mL solution of HNO3 has a concentration of 0.05 M, what is its pH? Also, how
many grams of HCl are in the solution?

Answer 1

HNO₃ --------> H⁺ +NO₃^–.

So H⁺ ion concentration = 0.05 = 5 x 10^–2 N

So pH = - log(5 x 10^–2)

pH = ‭1,3

m = 0.05 x 0.0075 x 63=0,02 g.