P2O5 + 6KOH = 2K3PO4 + 3H2O
n(P2O5) = 21.3/142 = 0.15 моль
n(K3PO4) = 0.15*2 = 0.3 моль
m(K3PO4) = 0.3*212 = 63.6 г
W(K3PO4) = 63.6/500*100% = 12.72%
P2O5 + 6KOH = 2K3PO4 + 3H2O
n(P2O5) = 21.3/142 = 0.15 моль
n(K3PO4) = 0.15*2 = 0.3 моль
m(K3PO4) = 0.3*212 = 63.6 г
W(K3PO4) = 63.6/500*100% = 12.72%