Number of moles of Calcium = 0.05 Number of equivalents of calcium = Number of moles / Valency = 0.05 / 2 = 0.025 Normality = 0.025 / 1 = 0.025 Ea /L Solution Number of moles of Calcium = 0.05 Number of equivalents of calcium = Number of moles / Valency = 0.05 / 2 = 0.025 Normality = 0.025 / 1 = 0.025 Ea /L.