A saturated solution of which of the follow-

ing substances in water would be the best
conductor of electricity?
1. CH4
2. Hg2Cl2
3. HCl
4. NH3
5. CH3COOH

To determine which of the substances would be the best conductor of electricity, we need to consider the dissociation of the substances in water.

1. CH4 (methane) does not dissociate into ions in water and therefore does not conduct electricity.

2. Hg2Cl2 (mercury(I) chloride) does not dissociate into ions in water significantly and therefore does not conduct electricity efficiently.

3. HCl (hydrochloric acid) dissociates into H+ and Cl- ions in water, making it a strong electrolyte and a good conductor of electricity.

4. NH3 (ammonia) does not dissociate into ions in water, although it reacts slightly with water to produce NH4+ and OH- ions. However, the concentration of these ions is very low, making NH3 a weak electrolyte and a poor conductor of electricity.

5. CH3COOH (acetic acid) partially dissociates into H+ and CH3COO- ions in water, but the concentration of these ions is relatively low, making CH3COOH a weak electrolyte and a poor conductor of electricity.

Therefore, HCl would be the best conductor of electricity among the given substances.

Out of the given options, HCl (hydrochloric acid) will form the best conductor of electricity when saturated in water.

The most soluble and most ionizable.