alkali
Pronunciation
Noun
B1 Intermediate
Quick answer
A substance that dissolves in water to form a solution with a pH greater than seven.
Synonyms and antonyms
Usage notes
Every alkali is a base, but not every base is an alkali: an alkali specifically dissolves in water.
Test yourself
Which word fits the gap? "Sodium hydroxide is a strong _____ often used to unblock drains."
Answer: alkali
In your own words, what does "alkali" mean?
A substance that dissolves in water to form a solution with a pH greater than seven.
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