\(a,2KOH+MgCl_2\rightarrow Mg\left(OH\right)_2+2KCl\\ b,SO_2+6HI\rightarrow H_2S+3I_2+2H_2O\\ c,Al_2O_3+6KHSO_4\rightarrow Al_2\left(SO_4\right)_3+3K_2SO_4+3H_2O\\ d,4Al\left(NO_3\right)_3\xrightarrow[]{t^o}2Al_2O_3+12NO_2+3O_2\\ e,2Cu+O_2+4HCl\rightarrow2CuCl_2+2H_2O\)
1)
\(a) 2KOH + MgCl_2 \to Mg(OH)_2 + 2KCl\\ b) SO_2 + 6HI \to H_2S +3 I_2 + 2H_2O\\ c) Al_2O_3 + 6KHSO_4\ to Al_2(SO_4)_3 + 3K_2SO_4 +3 H_2O\\ d) Cu + \dfrac{1}{2}O_2 + HCl \to CuCl_2 + H_2O\\ \)
2)
\(a) m_{Na_2CO_3} = 0,2.106 = 21,2(gam) ; m_{K_2O} = 0,7.94 = 65,8(gam)\\ b) n_{SO_2} = \dfrac{13,44}{22,4} = 0,6(mol) \Rightarrow m_{SO_2} = 0,6.64 = 38,4(gam)\\ n_{N_2} = \dfrac{3,36}{22,4} = 0,15(mol) \Rightarrow m_{N_2} = 0,15.28 = 4,2(gam)\)
