Question

Berapa gram kristal H2C2O4.H2O yang harus dilarutkan dalam air agar diperoleh 600ml larutan H2C2O4 0,5M(Ar C=12,O=16,H=1)

Answer 1

Verified answer

[H2C2O4] = 0,5 M
V H2C2O4 = 600 mL = 0,6 L

n H2C2O4 = [H2C2O4] × V H2C2O4
= 0,5 M × 0,6 L
= 0,3 mol

n H2C2O4 = n H2C2O4 . H2O = 0,3 mol

Mr H2C2O4 . H2O = 4 Ar H + 2 Ar C + 5 Ar O
= 4(1) + 2(12) + 5(16)
= 108

m H2C2O4 . H2O = Mr × n
= 108 × 0,3 mol
= 32,4 gram