Question

Calculate ph of 5litre soln of 1g HBr and 1 g HNO3

Answer 1

Explanation:

Molar mass:

HBr = 80.91 g/mol

HNO₃ = 63.01 g/mol

Number of moles

Moles of HBr = 1/80.91 = 0.01235

Moles of HNO₃ = 1/63.01 = 0.01587

Total moles of H⁺ = 0.01235 + 0.01587 = 0.02822

Molarity of solution

M = n/V

   = 0.02822/5

    =0.005644

pH = -log [H⁺]

     = -log 0.005644

      = 2.25

pH of solution will be 2.25.