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2 answers:
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Compounds which on dissolving in water gets completely dissociates into its ions are known as strong electrolytes whereas compounds which on dissolving in water gets partially dissociates into its ions are known as weak electrolytes.
Substances which gives solution on dissolving in water and do not dissociates into ions also does not conduct electric current are known as nonelectrolyte.
- Hydrochloric acid,
On adding (strong acid) in water, it will completely dissociates into ions (
and
) and thus, it is a strong electrolyte.
- Sodium hydroxide,
On adding (strong base) in water, it will completely dissociates into ions (
and
) and thus, it is a strong electrolyte.
- Formic acid,
On adding (weak acid) in water, it will partially dissociates into ions (
and
) and thus, it is a weak electrolyte.
- Methyl amine,
On adding (weak base) in water, it will partially dissociates into ions (
and
) and thus, it is a weak electrolyte.
- Potassium chloride,
On adding in water, it will completely dissociates into ions (
and
) and thus, it is a strong electrolyte.
- Ethanol,
On adding in water, it will not dissociates into ions and thus, it is a nonelectrolyte.
- Sucrose,
On adding in water, it will not dissociates into ions and thus, it is a nonelectrolyte.
<u>Question:</u>
For the cell constructed from the hydrogen electrode and metal-insoluble salt electrode, B) calculate the mean activity coefficient for 0.124 b HCl solution if E=0.342 V at 298 K
<u>Answer:</u>
The mean activity coefficient for HCl solution is 0.78.
<u>Explanation:</u>
Activity coefficient is defined as the ratio of any chemical activity of any substance with its molar concentration. So in an electrochemical cell, we can write activity coefficient as γ. The equation for determining the mean activity coefficient is
As we know that = 0.22 V and E = 0.342 V, the equation will become
So, the mean activity coefficient is 0.78.