Chemical Properties Of Bases

REACTION OF BASES WITH METALS:

Metals like zinc, tin and aluminum react with strong alkalies like NaOH (caustic soda), KOH (caustic potash) to evolve hydrogen gas.

• Zn(s) + 2NaOH(aq) Na₂ZnO₂ (aq) + H₂ (g)
  Sodium zincate

• Sn(s) + 2NaOH(aq)  Na₂SnO₂ (aq) + H₂ (g)
  Sodium stannite

• 2AI(s) + 2NaOH + 2H₂O  2NaAIO₂ (aq) + 3H₂ (g)
  Sodium meta aluminate

Chemical Properties Of Bases example

Question1.water soluble bases are known as …………………

Question 2. A commericial name of  potassium hydroxide is ………………..

Question3.Bases turn phenolphthalein in to ……………

Question 4.…………….  2NaAIO₂ (aq) + 3H₂ (g)

Answers:

Solution:1.Alkalies

Solution:2.Caustic Sba

Solution:3.Pink

Solution:4.2AI(s) + 2NaOH + 2H₂O