Dissolution of KMnO4 in Water

The video tutorial explains how to write the chemical equation for potassium permanganate (KMnO4) when it is dissolved in water. It begins by identifying the components of KMnO4, which include potassium (K+) and the permanganate ion (MnO4-). The video describes how KMnO4 dissociates into these ions when placed in water, a process that is facilitated by its solubility. The tutorial then demonstrates how to write the equation with the ions in their aqueous form, denoted by 'aq', and concludes with a summary of the process.

What is the charge of the permanganate ion (MnO4) in potassium permanganate?

• Variable

• Neutral

• Negative

• Positive

What happens to KMnO4 when it is added to water?

• It evaporates.

• It dissociates into ions.

• It remains unchanged.

• It forms a precipitate.

Which ion is formed from potassium in the dissolution of KMnO4?

• K2+

• K2-

• K+

• K-

What does the notation 'aq' signify in a chemical equation?

• Solid state

• Liquid state

• Gaseous state

• Dissolved in water

Why is it unnecessary to write H2O on the product side of the equation for KMnO4 dissolution?

• Because water is not involved in the reaction.

• Because water is a solid.

• Because water evaporates.

• Because the ions are already dissolved in water.

What is the final chemical equation for the dissolution of KMnO4 in water?

• KMnO4(s) + H2O(l) → K+(aq) + MnO4-(aq)

• KMnO4(s) + H2O(l) → KMnO4(aq)

• KMnO4(s) → KMnO4(aq)

• KMnO4(s) → K+(aq) + MnO4-(aq)