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In the previous posts, we have discussed on ACIDs in terms of their definitions and properties. Today we will continue by looking into the Chemical Definitions of BASEs in ‘O’ Level Chemistry.

A BASE is a substance that reacts with an ACID to form a SALT & WATER only.
Bases are Hydroxides (OH-) or Oxides (O2-) of metals including ammonium hydroxide.

Acid + Base –> Salt + Water (Neutralization Reaction)

E.g. CuO(s) + H2O(aq) –> CuSO4(aq) + H2O(l)

E.g. Mg(OH)2(s) + 2HNO3(aq) –> MgNO3(aq) + H2O(l)

Let’s try out an exam-based questions to see how much you understand.

Quick Check 1:
Consider the following reactions which involve reacting lead(II)oxide (PbO) and lead(IV)oxide (PbO2) with acids:

A. PbO(s) + 2HNO3(aq) –> Pb(NO3)2(aq) + H2O (l)
B. PbO2(s) + 2HCl(aq) –> PbCl2(s) + 2H2O(l) + Cl2(g)

Which of the above reactions is NOT a Neutralization reaction?

PS: Do leave your suggested answers in the “Comments Section” directly below this post.

PPS: This post belongs to a series of blogposts that is associated with Secrets of “Acids, Bases & Salts and Qualitative Analysis revelaed”

Related Articles:

• O Level Chemistry – Physical & Chemical Properties of ACIDs
• O Level Chemistry – Chemical Definition of ALKALIS
• O Level Chemistry – Physical & Chemical Properties of Alkalis
• O Level Chemistry – Basicity of Acids
• O Level Chemistry – Types of Oxides