Question

Completeaza ecuațiile reactiilor si stabileste coeficientii
a)....H2O+....Na-..........+......H2
b).....Fe(OH)3->.........+....H2O
c)......AlCl3+.....KOH->......KCl+ .....
d)......Na2O+....SiO2->...........
e)...Pb(NO3)2+......Zn->.....Pb+.....​

Answer 1

Răspuns:

à)H2O+Na=>NaOH+1/2H2

sau 2H2O +2Na=>2NaOH+H2

b)2Fe(OH)3=>Fe2O3 +3H2O

c) AlCl3+3KOH=>3KCl+Al(OH)3

d)2Na2O+SiO2=>Na4SiO4

e)Pb(NO3)2+Zn=>Pb+Zn(NO3)2