Question 2 What are alkali?
Question 3 What is common in all bases?
Question 4 What are strong bases. Give example?
Question 5 What are weak bases. Give example?
Question 6 What happen when zinc granules are heated with sodium hydroxide solution?
Question 7 What happen when a base react with non-metal oxide?
For Example: NaOH, KOH, Mg(OH)2, NH4OH
NaOH(s) → Na+(aq) + OH–(aq)
For Example : NaOH, KOH
A base which partially ionises in water and produce small amount of hydroxide ions.
For Example : Mg(OH)2, Ca(OH)2
Properties of Bases
(1) They have bitter taste.
(2) They have soapy touch.
(3) They turn red litmus to blue.
(4) They conduct electricity.
(5) They react with some metals to form hydrogen gas.
2NaOH(aq) + Zn(S) → Na2ZnO2(S) + H2(g)
2HCl(aq) + Mg(OH)2(s) → MgCl2(aq) + H2O(I)
Ca(OH)2 + CO2 → CaCO3 + H2O