将化肥、农药设法悬置于溶剂上部(简称上悬法),可以加快溶解速度,改善溶液质量。原理:溶质在溶液中存在着溶解和结晶两个相反的过程。上悬法由于溶质置于溶剂上部,溶解的粒子在重力的作用下,可以摆脱结晶作用,可用“未溶解的溶质—已溶解的溶质”表示。可见上悬法有较快的溶解 The fertilizer, pesticides try to suspend the solvent in the upper part (referred to as hanging method), can speed up the dissolution rate, improve the quality of the solution. Principle: There are two opposite processes of solute dissolution and crystallization in solution. The hanging method due to the solute placed in the upper part of the solvent, dissolved particles under the action of gravity, can get rid of crystallization, available “undissolved solute - dissolved solute” said. Can be seen on the suspension method faster dissolution