Question

Calculeaza masa nitratului de aluminiu format la interactiunea oxidului de aluminiu cu masa de 10,2 g cu acidul azotic, daca reactia are loc conform schemei:

Al2O3 + HNO3 = Al(NO3)3 + H2O (stabileste si inscrie coeficientii).

[Trebuie aflata masa Al(NO3)3...]

Answer 1

MAl2O3=2AAl+3AO=2*27+3*16=102g/mol

MAl2(NO3)3=2AAl+3(AN+3AO)=2*27+3(14+16*3)=240g/mol

102g..........................240g
Al₂O₃ + 3HNO₃ ⇒ Al₂(NO3)₃ + 3H₂O
10,2g............................24g

Al2(NO3)3 - azotat de aluminiu