アルカリ

アルカリ

alkali

JLPT N1

Understanding アルカリ

The word アルカリ refers to alkaline substances or alkalis, which are chemical compounds with basic properties. It is commonly used in scientific contexts, such as chemistry, but also appears in everyday language when discussing cleaning products or water types.

Common Contexts

  • Cleaning products: Many detergents are described as アルカリ性 (alkaline) because they effectively remove grease and stains.
  • Water types: アルカリ水 (alkaline water) is often marketed for its supposed health benefits and gentleness on skin.
  • Chemistry: The term is used to describe alkali metals and bases in the periodic table.

Collocations and Patterns

  • アルカリ性 (alkaline nature): Describes the chemical property of a substance.
  • アルカリ水 (alkaline water): Water with a higher pH, often discussed in health contexts.
  • アルカリ金属 (alkali metals): Refers to the group 1 metals in chemistry.

Usage Notes

When using アルカリ, it is often paired with 性 (せい) to indicate the alkaline property of a substance. It is a loanword from English and is used mainly in scientific or technical contexts, but also in product descriptions. Be careful not to confuse アルカリ with 酸 (さん, acid), which is the opposite chemical property.

This term is typically neutral in register and can be used in both formal and informal contexts when discussing relevant topics.

Example Sentences

このせんざいはアルカリせいなので、あぶらよごれにつよいです。

This detergent is alkaline, so it is strong against oily stains.

アルカリみずははだにやさしいとされています。

Alkaline water is considered gentle on the skin.

アルカリきんぞくはしゅうきひょうのだい1ぞくにぞくします。

Alkali metals belong to group 1 of the periodic table.