tentukan Mr dari H2O,NaOH,H2SO4,Ca(OH)2

Mr H2O
= (ar H x 2) + ( ar O x 1)
= (1 x 2) + (16 x 1)
= 2 + 16 = 18gr/mol

Mr NaOH
= (ar Na x 1) + (ar O x 1) + (ar H x 1)
= (23 x 1) + (16 x 1) + (1 x 1)
= 23 + 16 +1
= 40 gr/mol

Mr H2SO4
= (ar H x 2) + (ar S x 1) + (ar O x 4)
= (1 x 2) + (32 x 1) + (16 x 4)
= 2 + 32 + 64
= 98 gr/mol

Mr Ca(OH)2
= (ar Ca x 1) + (ar O x 2) + (ar H x 2)
= (40 x 1) + (16 x 2) + (1 x 2)
= 40 + 32 + 2
= 74 gr/mol