Question

Which of the following equations best represents what happens when hydrogen bromide dissolves in water?

1) 2HBr → Br2+H₂
2) HBR(g)→ H(aq) +Br(aq)
3) HBr (g) → H+(aq)+Br-(aq)
4) HBr (g) +H₂0 → Br- (aq) + H3O+(aq)

Answer 1

The correct equation representing hydrogen bromide dissolving in water is: HBr (g) + H2O (l) → Br- (aq) + H3O+ (aq), which is option 4. This shows the acid-base reaction where HBr donates a proton to water.

Step-by-step explanation:

The equation that best represents what happens when hydrogen bromide dissolves in water is HBr (g) + H2O (l) → Br- (aq) + H3O+ (aq). This reaction is an example of a hydrogen halide reacting with water and is analogous to the dissolution of hydrogen chloride (HCl) to form hydronium ions (H3O+) and solvated halide ions.

The correct answer to the question would be option 4, representing the direct interaction between the gaseous hydrogen bromide and the liquid water, leading to the formation of bromide ions and hydronium ions, which are characteristic products of an acid-base reaction where the acid donates a proton to the water.