Question

1.What happens when a zinc electrode is dipped in zinc sulphate solution¿¿
2.When a battery and a bulb is connected by a wire do the electrons leaving the battery reach the wire??(the drift velocity of electron is very low but the bulb glows immediately after switching it on)

Answer 1

Explanation:

1.
When a Zinc electrode is dipped in Zinc Sulphate solution, Zn oxidises and releases electrons in the solution
Reaction:

Zn → Zn$2+$ + 2e-
The above reaction is in equilibrium.

2.

1. When a battery and a bulb are connected by a wire, an electric field is applied and according to coulomb’s law of electricity opposite charges attract each other and similar charges repel each other.
2. Which states that the negatively charged electrons get attracted by the positive terminal of the battery and start flowing from the negative terminal of the battery to the positive terminal of the battery by drift velocity that is been applied.
3. The current starts flowing in the opposite direction of electron flow that is from the Positive terminal of a battery to the negative terminal of the battery.

Answer 2

• From a simple electrochemical cell it is determined that when a zinc electrode is dipped in zinc sulphate solution it gives zinc+ ion and electrons

                                 Zn → $Zn^{2+}$+ 2e-

This is in equilibrium

• Yes , when the battery is turned on , the electrons leave the battery to reach the wire as an electric field is applied and according to coulomb’s law of electricity opposite charges attract each other while similar charges repel each other.
• thats why the negatively charged electes get attracted by the positive terminal of the battery and start flowing from the negative terminal of the battery to the positive terminal of the battery by drift velocity that is been applied.

• The current starts flowing in the opposite direction of electron flow that is from the Positive terminal of a battery to the negative terminal of the battery.