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6.某同学为探究固体物质在水中溶解限量的影响因素,进行了如下实验探究活动,其实验步骤为:①用量筒量取5mL水,加入试管中,再加入少量硝酸钾晶体,搅拌至完全溶解:
6. Some of the students studied the influencing factors of the dissolution of solid substances in water. The following experimental investigations were conducted. The experimental steps were as follows: 1 A graduated cylinder was used to measure 5 mL of water, added to a test tube, and a small amount of potassium nitrate crystals was added. Dissolve: