Demonstration

Formation of a white precipitate.

When lead(II) nitrate and potaasium iodide are mixed in water, students observe the formation of a bright yellow precipitate, lead(II) iodide.

Formation of a bright yellow precipitate.

Lithium, sodium, and potassium react vigorously with water.

When soluble ioinc salts are dissoved in water the pH changes due an increase or decrease of hydronium ions, plus oher ions. Hydronium ions generated or consumed by the conjuate acid-base pairs, cause the pH to change and cuase a corresponding acid-base indicator color change.

Combustion of ethanol vapor shoots a stopper out of a bottle.

Bromine is cooled to form crystals.

The equilibrium visibly changes with temperature.

Magnesium metal reacts with hydrochloric acid react to produce bubbles of hydrogen gas and aqueous magnesium chloride.

Conductivity of strong electrolytes, weak electrolytes, and non-electrolytes is compared.