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--> Mr Ca(OH)2= 74
A. 2HNO3 + Ca(OH)2 --> Ca(NO3)2 + 2H2O
0,5 ?
?=mmol Ca(OH)2= 1/2 x 0,5= 0,25 mmol atau 0,00025 mol
B. Massa Ca(OH)2 yang dibutuhkan= n x Mr
= 0,00025 mol x 74
= 0,0185 gram