Question

200 ml of 1 molar h2 s o4 300 ml 3 molar hcl and hundred ml of 2 molar hcl are mixed and made up to 1 litre the proton concentration in the resulting solution is

Answer 1

Explanation:

1M H2SO4 solution has 2M H+ ions.

Therefore, moles of H+ in:

200 ml of 1M H2SO4 = 2 x 0.2L x 1mol/L = 0.4

300 ml of 3M HCl = 0.3L x 3mol/L = 0.9

100ML of 2M HCl= 0.1L x 2mol/L = 0.2

Total moles of H+ ions = 0.4 + 0.9 + 0.2

= 1.5

Total volume = 1 L

So, [H+] = 1.5mol/L