一定量的盐酸跟过量的铁粉反应时,为了减缓反应速度,且不影响生

一定量的盐酸跟过量的铁粉反应时,为了减缓反应速度,且不影响生成氢气的总量,可向盐酸中加入适量的

①NaOH固体  ②H2O ③NH4Cl固体  ④CH3COONa固体 ⑤NaNO3固体  ⑥KCl溶液

A.②④⑥      B.①②        C.②③⑤         D.②④⑤⑥

答案

A

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