题目内容

由Cu、Cu2O、CuO组成的混合物,加入200mL 0.6mol/L的HNO3溶液恰好使混合物溶解,同时收集到448mL NO气体(标准状况)。求:
(1)(5分)若将等质量的上述混合物在加热条件下用H2全部还原,能生成多少克Cu?
(2)(5分)若题述混合物中含Cu 0.02mol,则其中含CuO多少mol ?
(1) 0.448L = 0.02mol
铜的质量为 (0.2L × 0.6mol/L - 0.02mol )×1/2×64g/mol = 3.2g
(2) n(Cu2O) =" (0.02×3" – 0.02×2 )1/2 =0.01mol
n(CuO) =" (0.2×0.6" – 0.02)1/2 – 0.02 -0.01×2 = 0.01mol
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I.打开弹簧夹,打开活塞a,滴加浓盐酸。
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III.当B中溶液由黄色变为棕色时,关闭活塞a。
IV.……
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