what do you mean by alkali?

Alkali

• A chemical that can dissolve in water, combine with acids to form salts, and make acids less acidic.
• Alkalis have a bitter taste and turn certain dyes blue.
• An alkali is a substance with a pH value of more than 7.
• Alkalis form chemical salts when they are combined with acids.
• They are water-soluble strong bases.
• Alkalis feel soapy to touch, have pH above 7.0, and turn litmus paper blue.
• Strong alkalis (such as caustic soda) can cause severe burns.

• Common alkali-containing substances are lyes, ammonia, hair-relaxing agents, nonphosphate detergents, dishwasher soaps, and disk batteries.

• Lyes are alkaline agents that contain sodium hydroxide $\left(NaOH\right)$ , potassium hydroxide $\left(KOH\right)$ , or calcium hydroxide $\left(Ca{\left(OH\right)}_2\right)$