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Al(s) + H2SO4(aq) → Al2(SO4)3(aq) + H2(g). Al has been oxidised 0 to +3. We need 2Al on the LHS as we have 2 on the right. Hydrogen has been reduced from +1 to 0. We are balanced for H, so the equation at this stage looks likeOverall reaction- Al + NaOH+H20→ NaAlO2 + H2↑ First you should think why Al would react with a base?..The reason is simple Al is a amphoteric metal which makes it capable to react with both acidic and basic species.Now coming to reaction,Under nor... • CuBr2 + Pb(NO3)2 = Cu(NO3)2 + PbBr2. • Ba(C2H3O2)2 + CuBr2 = BaBr2 + Cu(C2H3O2)2. • CuBr2 + CaSO4 = CaBr2 + CuSO4 ...SO2 (aq)VO(aq)2++SO4 aq2+ (Medio ácido) b)HCOOH(aq)+MnO4CO2 aq+Mn(aq)2+ (Medio ácido) c)S2O (aq)2-+I2 (aq)S4O6 (aq)2-+Iaq Br2 (g)CrO4 (aq)2-+Br(aq) (Medio ácido). emilycalorobalino26 está esperando tu ayuda. Añade tu respuesta y gana puntos.