alkali

• 一种水溶性化合物，能使石蕊变蓝，与酸反应生成盐和水；也指干旱土壤中可损害农业的可溶性盐类。

A noun referring to a water-soluble compound that turns litmus blue and neutralizes acids to form salts and water, or to soluble salts in arid soils that can harm agriculture.

1. Chemical baseB2formalscientific

   Any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water.

   碱

   • Sodium hydroxide is a common alkali used in soap making.
   • The chemist tested the solution and found it to be an alkali.
   • When an alkali reacts with an acid, it neutralizes it.

   同义词base

   反义词acid

2. Soil salt mixtureC1formalscientific

   A mixture of soluble salts found in arid soils and some bodies of water, often detrimental to agriculture.

   土壤盐碱混合物

   • The soil in the region has a high alkali content, making it difficult to grow crops.
   • Alkali flats are common in dry desert areas.
   • Farmers must treat alkali soils to improve fertility.