Răspuns:
a) MHNO3 =1+14+3×16=63g/mol
MCa(NO3)2=40+2×14+6×16=164g/mol
n=m/M
m=n×M=5×63=315g HNO3
2×63g...............................164g
2HNO3 + Ca(OH)2 → Ca(NO3)2 + H2O
315g....................................xg
x=315×164/2×63=calculează
2moli.........................................................1mol
b) 2HNO3 + Ca(OH)2 → Ca(NO3)2 + H2O
5moli..........................................................y moli
y=5×1/2=calculează
c) MCa(OH)2=40+2×16+2×1=74g/mol
2×63g..........74g
2HNO3 + Ca(OH)2 → Ca(NO3)2 + H2O
315g.............zg
z=315×74/2×63=calculează