综合高中化学常见的化学反应,物质间的定量问题通常出现在以下几个方面。一、二(多)元弱酸及其对应的酸性氧化物与碱的反应例:将少量的CO2通入足量的NaOH溶液中,此时碱液过量,不能有酸式盐出现,所以生成物为Na2CO3,即:CO2+2NaOH=Na2CO3+H2O In light of the common chemical reactions in high school chemistry, quantitative problems among substances usually occur in the following areas. One or two or more weak acid and its corresponding acidic oxide and alkali reaction example: A small amount of CO2 is passed into a sufficient amount of NaOH solution. At this time, the alkali solution is excessive, and no acid salt appears, so the product For Na2CO3, ie: CO2+2NaOH=Na2CO3+H2O