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Mr H2SO4 = 2.1+32+4.16 = 98
n = gram/Mr
= 1,96 / 98 = 0,02 mol
M = n / v
= 0,02 / 0,2 = 0,1 M
H2SO4 ---> 2H⁺ + SO4²⁻
[H⁺] = 2 x 0,1 = 0,2 = 2 x 10⁻¹
PH = - log 2 x 10⁻¹
= 1 - log 2
= 1- 0,3
= 0,7