1. 等质量的不同种活泼金属单质与足量的稀酸溶液反应时,放出气体的质量,可用反应生成盐中金属元素化合价与原子量之比来衡量,其比值大者,放出气体的质量较大。例1 等质量的铁、锌、镁、铝分别与足量的稀盐酸反应,按放出氢气质量由大到小的排列顺序为______。解:根据题 1. The quality of evolved gas when reacting with different qualities of different active metal elements and sufficient amount of dilute acid solution can be measured by the ratio of valence and atomic weight of the metal elements in the reaction salt. Big. Example 1 The equivalent mass of iron, zinc, magnesium, and aluminum were reacted with a sufficient amount of dilute hydrochloric acid, respectively, and the order of the quality of the discharged hydrogen gas from large to small was ______. Solution: According to the question