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在溶液pH值的计算问题中,酸、碱溶液的中和与弱碱溶液的混和,在北京海淀区教师进修学校主编的《高三化学辅导与练习》中已有例证。对于同一种强酸或强碱溶液的混和,在《中学化学教学参考》1982年第二期“有关pH值问题的计算公式”一文中也有例证。但该文例证中的公式,只符合同一强酸的混和,对于同一强碱溶液混和的计算则是错误的。为了解决这一计算问题,特进行以下讨论。
In the calculation of the pH value of the solution, the neutralization of the acid and alkali solution and the mixture of the weak alkaline solution have been exemplified in the “High School Chemistry Guidance and Practice” edited by the Teacher Training School in Haidian District, Beijing. For the same kind of strong acid or alkali solution mixture, in the “secondary chemistry teaching reference” 1982 second period “ calculation formula about the pH value ” also has an example. However, the formula in this article only complies with the same strong acid mixture, and it is wrong to calculate the same strong alkali solution. In order to solve this calculation problem, the following discussion is specifically made.