1) BaCl2 + Na2SO4 -> BaSO4 + 2NaCl
2) NaCl + AgNO3 -> AgCl + NaNO3
3) Na3PO4 + 3AgNO3 -> Ag3PO4 + 3NaNO3
Mg + H2SO4 = MgSO4 + H2
n(Mg) = m/M = 4.8 / 24 = 0.2 моль
n(MgSO4) = 1 * 0.2 = 0.2 моль
m(<span>MgSO4</span>) = n*M = 0.2 * (24+32+16*4) = 24 г
1. Cr + Cl2 = CrCl2
2CrCl2 + Cl2 = 2CrCl3
CrCl3 + 3LiOH = Cr(OH)3 + 3LiCl
2. 2Cr + 3H2SO4 = Cr2(SO4)3 + 3H2
Cr2(SO4)3 + 6KOH = 2Cr(OH)3 + 3K2SO4
2Cr(OH)3 + NaOH = Na[Cr2(OH)6]