Question

Tolong dong

tentukan ph dari 100 ml larutan yg mengandung 9,8 gram H2 SO4 jika (ArH=1,S=32,O=16)

Answer 1

Mol H₂SO₄ = massa/Mr
mol = 9,8/98
mol = 0,1 mol

Molaritas = mol/Volume
Molaritas = 0,1/0,1 = 1 M

[H⁺] = Molaritas x Valensi
[H⁺] = 1 x 2
[H⁺] = 2 M

pH = -log [H⁺]
pH = -log 2

Ok?