Question

Опишите механизм растворения в воде бромида калия

Answer 1

Бромид калия является типичной ионной солью. При растворении в воде подвергается полной диссоциации, при этом не подвергается гидролизу, т.к. соль образованна сильным основанием  и сильной кислотой .

 

Answer 2

Mechanism of Dissolving Potassium Bromide in Water

When potassium bromide (KBr) is dissolved in water, it undergoes a process called dissociation, where the ionic compound breaks down into its constituent ions. The mechanism of dissolving potassium bromide in water can be described as follows:

1. Ionization: When solid potassium bromide is added to water, the polar water molecules surround the ions in the crystal lattice and pull them away from each other. The positive potassium ions (K+) are attracted to the negative oxygen atoms in water, while the negative bromide ions (Br-) are attracted to the positive hydrogen atoms in water.

2. Separation of Ions: The water molecules effectively separate the potassium and bromide ions from each other, breaking the ionic bonds in the solid crystal lattice of KBr. The ions become surrounded by water molecules, forming hydrated ions.

3. Hydration: The water molecules form a hydration shell around each ion, stabilizing them in solution. The oxygen atoms of water molecules surround the potassium ions, while the hydrogen atoms surround the bromide ions. This hydration process helps to prevent the ions from recombining and allows them to move freely in the solution.

The overall equation for the dissolution of potassium bromide in water can be represented as:

KBr(s) → K+(aq) + Br-(aq)

In this equation, (s) represents the solid state, and (aq) represents the aqueous state, indicating that the ions are dissolved in water.

It is important to note that the dissolution of potassium bromide in water is an exothermic process, meaning that it releases heat. This is because the formation of new ion-water interactions releases energy.

Please let me know if there is anything else I can help you with!