Question

definition of acids and bases​

Answer 1

Answer:

A substance with particular chemical properties with sour taste is called acid

Any substance that in water slippery to touch, bitter in taste, changes colour of indicator is called Base

Answer 2

Acids :-

Acids are the substances that disassociates Hydronium ions in thier aqueous solution and accepts and accept electrons.

Properties of Acids :-

1. Acids are corosive in nature and have a sour taste.
2. Acids turn blue litmus to red and have no change on red litmus paper.
3. Acids react with metal to give metal salt and Hydrogen gas.
4. Acids react with bases to give neutral salt and water, This reaction is also called Neutralization reaction.
5. Acids generally have low pH value which is between 0 and 7.

Acids are further divided into Strong acids & weak acids.

• Strong acids completely disassociate ions in thier aqueous solution and release a huge concentration of hydronium ions.

e.g., HCl, H₂SO₄ , HNO₃

• Weak acids don't completely disassociate ions in thier aqueous solution and release comparatively low concentration of hydronium ions as compared to strong acids.

e.g., CH₃COOH, HF

Bases :-

Bases are the substances that relase hydroxide ions in thier aqueous solution and donates electrons.

Properties of Bases :-

1. Some bases are corrosive in nature ( pH somewhere near 13-14 ) and have bitter taste.
2. Bases turn red litmus to blue and have no change on blue litmus paper.
3. Aqueous solution of bases conduct electricity ( due to the presence of hydroxide ions )
4. Bases generally have pH greater than 7. Bases of pH 13-14 are called alkalis.
5. Bases donates electrons and accept protons.

Just like acids, Bases are also divided into Strong bases and weak bases.

• Strong bases disassociate hydroxide ions in thier aqueous solution completely and release a huge concentration of hydroxide ions.

e.g., NaOH, KOH

• Weak bases disassociate ions in thier aqueous solution partially and release comparatively lower concentration of ions as compared to strong bases.

e.g., Al(OH)₃ , Pb(OH)₂