Question

Jika 100 ml larutan HCl 0.4M dicampur dengan 400 mL larutan H2SO4 0.075M maka pH larutan campuran menjadi

Answer 1

HCl 0,4 M => [H+] = 0,4 M
H2SO4 0,075 M => [H+] = 2 x 0,075 = 0,15 M

[H+] = (100x0,4) + (400x0,15) / (100+400)
[H+] = 0,2 M
pH = - log [H+]
pH = - log 0,2
pH = 1 - log 2 = 1 - 0,3 = 0,7