8.
下列物质的转化在给定条件下能实现的是\(\rm{(}\) \(\rm{)}\)
\(\rm{①Al_{2}O_{3} \xrightarrow[\triangle ]{NaOH(aq)}NaAlO_{2}(aq) \overset{CO_{2}}{ }Al(OH)_{3}}\)
\(\rm{②S \overset{O_{2}/{点燃}}{ }SO_{3} \overset{H_{2}O}{ }H_{2}SO_{4}}\)
\(\rm{③}\)饱和\(\rm{NaCl(aq) \overset{NH_{3},CO_{2}}{ }NaHCO_{3} \overset{\triangle }{ }Na_{2}CO_{3}}\)
\(\rm{④Fe_{2}O_{3} \overset{HCl(aq)}{ }FeCl_{3}(aq) \overset{\triangle }{ }}\)无水\(\rm{FeCl_{3}}\)
\(\rm{⑤MgCl_{2}(aq) \overset{{石灰乳}}{ }Mg(OH)_{2} \overset{{煅烧}}{ }MgO}\).