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【原题】“18.4克 NaOH 和 NaHCO_3固体混和物,在密闭容器中加热到约250℃,经充分反应后排出气体,冷却,称得剩余固体质量为16.6克。试计算原混和物中 NaOH 的百分含量。”标准答案从混和物总质量18.4克角度出发,设NaOH 和 NaHCO_3的物质的量之比正好为1:1时加热后应失重2.67克,若 NaOH 和 NaHCO_3的物质的量之比大于或小于1:1,则混和物的失重应分别小于或大于2.67克。从而求得 NaOH 为10克,百分含
[original title] “18.4 g NaOH and NaHCO3 solid mixture, heated to about 250 °C in a closed container, after adequate reaction, the exhaust gas, cooling, said the remaining solid mass of 16.6 g. Calculate the NaOH in the original mixture Percentage content.” The standard answer starts from the point that the total mass of the mixture is 18.4g. If the ratio of the amount of NaOH and NaHCO3 is exactly 1:1, the weight loss after heating should be 2.67g. If the ratio of NaOH and NaHCO3 is the same, Greater than or less than 1:1, the weight loss of the blend should be less than or greater than 2.67 grams, respectively. In order to obtain 10 grams of NaOH, 100%