Question

Write reactions to show the dissociation into ions of the following substances when they dissolve in water: a) sodium phosphate b) ammonium hydroxide

Answer 1

Sodium phosphate dissociates in water to form Na+ and PO4^(3-). Ammonium hydroxide separates into NH4+ and OH- when dissolved. These reactions illustrate the formation of ionic species in aqueous solutions.

Step-by-step explanation:

Dissociation of Sodium Phosphate in Water

When sodium phosphate (Na3PO4) dissolves in water, it dissociates into sodium ions (Na+) and phosphate ions (PO43-). The balanced chemical equation for this dissociation is:

Na3PO4(s) → 3Na+(aq) + PO43-(aq)

Dissociation of Ammonium Hydroxide in Water

Ammonium hydroxide (NH4OH), when dissolved in water, separates into ammonium ions (NH4+) and hydroxide ions (OH-). The balanced chemical equation for dissociation of ammonium hydroxide is:

NH4OH(aq) → NH4+(aq) + OH-(aq)

Both reactions are examples of compounds forming ionic species in water, increasing the concentration of those ions in the solution.