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1、在盐酸中溶解11.5克铝、铜和镁混和物时,放出7升(0℃和0.8大气压下)气体,再将不溶的残物加入到浓硝酸中去,这时又放出4.48升气体(标准状况下)。计算原混和物中每种金属的质量。 (2.77克Al,6.4克Cu,2.33克Mg) 2、用盐酸处理1.68克两单质合金时,放出448毫升氢气(标准状况下),并且留下0.56克不溶剩余物;而用强碱溶液处理该合金时,则放出896毫升氢气(标准状况下),且留下1.12克不溶剩余物,试确定混和物的组成。
1. When 11.5 grams of aluminum, copper, and magnesium are dissolved in hydrochloric acid, release 7 liters (at 0°C and 0.8 atmosphere) of gas, and add the insoluble residue to the concentrated nitric acid, then release 4.48 liters of gas. (under standard conditions). Calculate the mass of each metal in the original blend. (2.77 grams of Al, 6.4 grams of Cu, 2.33 grams of Mg) 2. When 1.68 grams of the two element alloys were treated with hydrochloric acid, 448 milliliters of hydrogen (standard conditions) was evolved and 0.56 grams of insoluble residue was left behind; treatment with a strong base solution For this alloy, 896 ml of hydrogen (standard conditions) were released and 1.12 g of insoluble residue was left to determine the composition of the mixture.