一、化学反应与液体浮力的融合这类试题主要依据溶液中因加入其它物质而发生化学反应,使溶质(或溶质的量)发生改变,从而引起溶液密度的变化(溶液的体积变化忽略不计),最终引起浮力的变化,这里“加入其它物质”可以是新加入的,也可以是原来就挂在弹簧测力计上的物质(固体体积变化忽略不计). First, the fusion of chemical reaction and liquid buoyancy This kind of test is mainly based on the chemical reaction of the solution due to the addition of other substances, so that the solute (or the amount of solute) changes, resulting in a change in solution density (volume change of the solution is ignored) Finally, the change of buoyancy is caused. Here, “adding other substances” can be added newly, or it can be the material originally hung on the spring dynamometer (the change of solid volume is neglected).