Dissociate

The video explains the concept of ions and reversible processes in chemistry. It uses the example of salt dissolving in water to form sodium and chloride ions, which can be reversed by evaporating the water, leading to the reformation of salt.

What is the general nature of the process involving ions?

• It is irreversible.

• It is unpredictable.

• It is usually reversible.

• It is always reversible.

When salt is dissolved in water, what ions are formed?

• Potassium and nitrate ions

• Sodium and chloride ions

• Hydrogen and oxygen ions

• Calcium and carbonate ions

What happens to salt when it is dissolved in water?

• It forms a new compound.

• It changes color.

• It disappears but can be reformed.

• It becomes a gas.

How can the dissolved salt be reformed?

• By adding more water

• By evaporating the water

• By heating the solution

• By cooling the solution

What is the key factor in the reversibility of salt dissolution?

• The amount of salt dissolved

• The evaporation of water

• The temperature of the water

• The type of salt used