256.在碱的含量测定时,一般不选用盐酸作标准滴定溶液,因为盐酸易挥发。()

(The second question): 在碱的含量测定时，一般不选用盐酸作标准滴定溶液，因为盐酸易挥发。 (A.正确 B.错误) "When determining the content of a base, hydrochloric acid is generally not chosen as the standard titrant because it is easily volatile." (B. Incorrect) 解析 (Analysis): The answer is incorrect (B.错误). In fact, hydrochloric acid (HCl) is commonly used as a standard titrant in acid-base titrations. Its ease of volatility is not a significant concern in this context because the titration process is conducted in a controlled environment, and any loss of HCl due to volatility can be compensated for during the standardization of the titrant. The primary reason for not using HCl as a standard titrant in certain cases may be related to the specific properties of the base being titrated, but volatility is not the main factor.