What are the ions present in the solutions of the following substances?

(a) Hydrochloric acid:
i. H⁺ (hydrogen ions)
ii. Cl⁻ (chloride ions)

(b) Nitric acid:
i. H⁺ (hydrogen ions)
ii. NO₃⁻ (nitrate ions)

(c) Sulphuric acid:
i. H⁺ (hydrogen ions)
ii. HSO₄⁻ (hydrogen sulfate ions)

(d) Potassium hydroxide:
i. K⁺ (potassium ions)
ii. OH⁻ (hydroxide ions)

(e) Magnesium hydroxide:
i. Mg²⁺ (magnesium ions)
ii. OH⁻ (hydroxide ions)