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在现行初中化学教材２１４页的“实验八”中，要求学生用ｐＨ试纸分别测浓度均为１∶４的盐酸、硫酸、硝酸的ｐＨ值。在实验中发现效果不理想。笔者认为这些酸的浓度太高，不宜做该实验。现将这三种酸的有关数据列表如下（在计算过程中，溶液体积的微小变化忽略不计）：数据酸
In the “Experiment 8” of the current junior middle school chemistry textbook page 214, students are required to use a pH test paper to measure the pH values of hydrochloric acid, sulfuric acid, and nitric acid, each having a concentration of 1:4. It was found that the effect was not satisfactory in the experiment. The author believes that the concentration of these acids is too high to be suitable for this experiment. The relevant data for these three acids are listed below (in the calculation process, small changes in the volume of the solution are ignored): Data Acid