中考化学的实验题知识
以下是小编收集整理的中考化学的实验题知识,本文共6篇,仅供参考,希望对大家有所帮助。 ● 中考化学的实验题知识 一、配制100克5%的氯化钠溶液 1.用天平称量氯化钠时应注意:先调平、再放纸,镊子取砝码、左物右码; 2.量取蒸馏水时注意: 倾倒(瓶塞倒放、标签向手心、手持量筒并倾斜、瓶口紧挨量筒口); 滴加(胶头滴管垂直悬空于量筒正上方,超过95mL时,不能将胶头滴管伸进量筒内吸取,可以倒出少量再
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