alkalis是什么意思？

alkalis

英['ælkəlɪs] 美['ælkəlɪs]

• n. 碱金属，碱( alkali的名词复数 )；

例句

• Weak alkalis ionize partly ( ionize ) in water to give hydroxide ion. 弱碱 在水中部份电离,放出氢氧离子.
• Aluminium and other metals are normally badly corroded by alkalis. 铝和其他金属通常会被碱严重腐蚀.
• What's the scale that's used to compare the strength of acids and alkalis? 用何种标准来比较酸碱度？
• Acids neutralize alkalis and vice versa. 酸能使碱中和,碱亦能使酸中和.

柯林斯高阶英汉双解学习词典释义

• N-MASS
  碱
  An alkali is a substance with a pH value of more than 7. Alkalis form chemical salts when they are combined with acids.