1)
<span>2</span>AL<span> +</span>Fe2O3<span> =AL</span>2O3<span> +2Fe. реакция замещения</span>
<span>H2SO4<span>+</span>Na2SiO3<span>=</span>Na2SO4<span>+</span>H2SiO3 реакция обмена</span>
<span>2Ca+O2=>2CaO реакция соединения</span>
Al<span>(</span>OH<span>)</span>3<span> + </span>3HNO3<span> = </span>Al<span>(NO3)3 + 3H2O реакция обмена</span>
<span>2) задача не дописана данные пропущены</span>
<span>3)</span>
<span>Na2SO4<span>+</span>BaCl2<span>=2NaCl+BaSO4.обмен</span></span>
<span><span><span>6AL+6HCL=2AlCl3+3H2. замещение</span></span></span>
<span><span><span>HNO3<span> + </span>BaCl2<span> = BaNO3 + HCl2 обмен</span></span></span></span>