硝酸铜是制备\(\rm{Cu—Zn—Al}\)系催化剂的重要原料。现有三种制取硝酸铜的实验方案可供选用
\(\rm{①}\)铜与稀硝酸反应制取:\(\rm{3Cu+8HNO}\)\(\rm{{\,\!}_{3}}\)\(\rm{(}\)稀\(\rm{)}\)\(\rm{ \overset{∆}{=} }\)\(\rm{3Cu(NO}\)\(\rm{{\,\!}_{3}}\)\(\rm{)}\)\(\rm{{\,\!}_{2}}\)\(\rm{+2NO↑+4H}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)
\(\rm{②}\)铜与浓硝酸反应制取:\(\rm{Cu+4HNO_{3}(}\)浓\(\rm{)=Cu(NO_{3})_{2}+2NO_{2}↑+2H_{2}O}\)
\(\rm{③}\)首先将铜屑在空气中加热生成氧化铜,氧化铜与稀硝酸反应制取:\(\rm{2Cu+O_{2}}\)\(\rm{ \overset{∆}{=} }\)\(\rm{2CuO}\),\(\rm{CuO+2HNO_{3}=Cu(NO_{3})_{2}+H_{2}O}\)下列说法正确的是