Răspuns:
Date necesare M,CuSO4=160g/mol M,NaOH=40g/mol M,Na2SO4=142g/mol
M,Cu(OH)2=98g/mol
-calculez moli CuSO4
niu= 480g/160g/mol= 3molCuSO4
-deduc moli substante participante la reactie ,din ecuatia chimca
1mol...........2mol................1mol..............1mol
Cuso4 + 2NaOH-----> Na2SO4 +Cu(OH)2
3mol.......x= 6mol............y=3mol............z= 3mol
-calculez masa Cu(OH)2 SI NaOH
m,Cu(OH2)= niuxM= 3molx98g/mol=........................calculeaza
m,NaOH= 6molx40g/mol= .............................calculeaza !!!!
Explicație: