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1.下列实验操作或对实验事实的叙述中错误的是A.用50mL酸式滴定管准确量取25.00mL酸性KMnO4溶液,放入锥形瓶中待用B.在测定硫酸铜晶体的结晶水时,将灼烧硫酸铜晶体的坩埚放在空气中冷却,然后称量C.在中和热的测定中,用温度计测出盐酸、氢氧化钠溶液混合后的最高温度作为终止温度,所需的玻璃仪器仅有烧杯、温度计和量筒
1. The following experimental operation or the experimental facts of the error is A. 50mL acid burette accurate amount of 25.00mL acidic KMnO4 solution was placed in a conical flask to be used B. Determination of crystal water in the copper sulfate crystal , The burning of copper sulfate crystals in the crucible placed in the air cooling, and then weighing C. In the determination of neutralization, with a thermometer to measure the maximum temperature of hydrochloric acid, sodium hydroxide solution after mixing as the termination temperature, the required Glassware only beaker, thermometer and measuring cylinder