When aqueous salutions of an acid and base are mixed
(9). No reaction occurs (b) a new acid and
a new base are formed
(c) a salt and
water are formed
anocid and a salt are formed
Answers
Answer- The above question is from the chapter 'Acids, Bases and Salts'.
Let's know about acids, bases and salts first.
Acids: These are substances in which taste sour. They contain H⁺ ions.
Example: HCl, H₂SO₄, H₂CO₃, etc.
Strong acids have more H⁺ (aq) ions than weak acids.
Strong acids are HCl, H₂SO₄, HNO₃, etc.
Weak acids are H₂CO₃, H₃PO₄, etc.
Acids have pH less than 7.
Bases: These are substances in which taste bitter. They contain OH⁻ ions.
Example: KOH, NaOH, Ca(OH)₂, Mg(OH)₂ etc.
Strong bases have more OH⁻ (aq) ions than weak bases.
Strong bases are KOH, NaOH, Ca(OH)₂, etc.
Weak bases are Mg(OH)₂, NH₄OH, etc.
Bases have pH more than 7.
Neutralisation Reaction: When a strong acid and a strong base react with each other, they form salt and water.
This salt has a pH = 7.
Example: NaOH + HCl → NaCl + H₂O
Strong Acid + Weak Base → Acidic Salt + Water
Strong Base + Weak Salt → Basic Salt + Water
Given question: When aqueous solutions of an acid and base are mixed
(a) no reaction occurs.
(b) a new acid and a new base are formed.
(c) a salt and water are formed.
(d) an acid and a salt are formed.
Answer: (c) a salt and water are formed.