Question

1 metru patrat de oglinda are 5,04 g de argint cit etanal trebuie pentru 2 metri patrati de oglinda?

Answer 1

CH3CHO + 2 [Ag(NH3)]2]OH = CH3COOH + 2 Ag + 4 NH3 + 2 H2O
1 m2 oglindă...........5,04 g Ag
2 m2................................x
x = 10,08 g Ag
M etanal = 2*12+4*1+16 = 44
M Ag = 108
44 g etanal..............108 g Ag
y.................................10,08 g Ag
y = 4,1066 g etanal