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氮的氧化物既是可导致酸雨的物质,也是造成空气污染的重要物质,加大对氮的氧化物的治理是环境保护重要举措。 (1) 在一定条件下氨气可用来将氮氧化物转化为无污染的物质。写出氨气和二氧化氮在一定条件下反应的化学方程式: ___________________________________________ , 该反应中氧化剂是 ______ ____ ,还原剂是 ______ ____ 。 (2) 汽车尾气中含有 CO 和 NO ,消除这两种物质对大气的污染的方法是安装催化转化器,使它们发生反应生成对大气无污染的气体,该反应的化学方程式为 ______ ________________________ 。 (3) 用氢氧化钠溶液可以吸收废气中的氮氧化物,反应的化学方程式如下: NO 2 + NO + 2NaOH == 2NaNO 2 + H 2 O 2NO 2 + 2NaOH == NaNO 2 + NaNO 3 + H 2 O 现有 V L 某 NaOH 溶液能完全吸收 n mol NO 2 和 m mol NO 组成的大气污染物。 1所用烧碱溶液的物质的量浓度至少为 ______ ____ mol·L - 1 。 2若所得溶液中 c (NO ) ∶ c (NO ) = 1 ∶ 9 ,则原混合气体中 NO 2 和 NO 的物质的量之比 n ∶ m = ______ ____ 。 3用含 n 和 m 的代数式表示所得溶液中 NO 和 NO 浓度的比值 c (NO ) ∶ c (NO ) = ______ ____ 。
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