4.
现有三种制取硝酸铜的实验方案可供选用:下列有关说法正确的是\(\rm{(}\) \(\rm{)}\)
\(\rm{①}\)铜与稀硝酸反应制取:\(\rm{3Cu+8HNO_{3}(}\)稀\(\rm{)═3Cu(NO_{3})_{2}+2NO↑+4H_{2}O}\)
\(\rm{②}\)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:
\(\rm{2Cu+O_{2} \dfrac { \overset{\;\;\triangle \;\;}{ -}}{\;}2CuO}\),\(\rm{CuO+2HNO_{3}═Cu(NO_{3})_{2}+H_{2}O.}\)