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Ca(OH)2 + 2HNO3 ---> Ca(NO3)2 + 2H2O
n.HNO3 = 10 x 0,05 = 0,5 mmol
mol Ca(OH)2 yang dibutuhkan = 1 x 0,5/2 = 0,25 mmol = 0,00025 mol
massa Ca(OH)2 yang dibutuhkan = n x Mr = 0,00025 x 74 = 0,0185 gram