Specify what ions are present in solution upon dissolving each of the following substances in water.

FeCl2

HNO3

(NH4) 2SO4

Ca (OH) 2

The answer to your question is below

Explanation:

Ions is a molecule with a charge

Cations are ions with a positive charge

Anions are ions with a negative charge

FeCl2 Fe⁺² Iron (II) + 2Cl⁻¹ Chloride

HNO3 H⁺¹ Hydrogen + NO₃⁻¹ Nitrate

(NH4) 2SO4 2NH₄⁺¹ Ammonium + SO₄ ⁻² Sulphate

Ca (OH) 2 Ca⁺² Calcium + 2OH⁻¹ Hydroxide

FeCl₂ → Fe²⁺ + Cl⁻

HNO₃ → H⁺ + NO₃⁻

(NH₄) ₂SO₄ → NH₄⁺ + SO₄²⁻

Ca (OH) ₂ → Ca²⁺ + OH⁻

Explanation:

Each of these given compounds will dissociate into cations and anions upon dissolution in water. The compounds and constituent species are tabulated as under:

Compound Cation Anion

FeCl₂ (Ferrous chloride) Fe²⁺ (Ferrous) Cl⁻ (Chloride)

HNO₃ (Nitric acid) H⁺ (Hydron) NO₃⁻ (Nitrate)

(NH₄) ₂SO₄ (Ammonium sulfate) NH₄⁺ (Ammonium) SO₄²⁻ (Sulphate)

Ca (OH) ₂ (Calcium hydroxide) Ca²⁺ (Calcium) OH⁻ (Hydroxide)

Each of these compounds is made up of cations and anions but by convention while writing a chemical formula a cation is written first followed by an anion.