Which of the following statements about acid is wrong?
A. The substance that can ionize hydrogen ions in aqueous solution is acid.
B. The substance that can accept protons is acid.
C. The substance that can accept a lone pair of electrons is acid.
D. Acid must contain the hydrogen element.
查看答案
Sodium hydroxide solid can be used to prepare standard solutions.
The acidity of HAc is stronger than that of H2CO3.
The conjugate base of HCN is CN–.
Which of the following methods can eliminate system errors?
A. Calibrate measuring instruments.
B. Improve measurement methods.
Change the test temperature.
D. Run a controlled experiment.
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