Demonstration

Zinc metal is plated onto a copper electrode by electrolysis.

A standard Zinc/Copper Voltaic Cell: Zn(s) in 1.0 M zinc sulfate solution, Cu(s) in a 1.0 M copper(II) sulfate solution, salt bridge and voltmeter, E°cell = +1.10 Volts.

Acid and base added to buffers of various concentrations to show capacity and how it is affected.

The addition of concentrated hydrochloric acid to a saturated solution of sodium chloride causes solid sodium chloride to precipitate out.

Place a burning Cheeto underneath a beaker of water. The burning Cheeto heats the water. The initial and final temperature of the water is measured and recorded. Temperature rise is monitored. The change in temperature is calculated. The heat gained by the water is calculated, q gained by water = mass of the water x specific heat of the water x ΔT. The heat given off by the Cheeto is calculated q loss + g gain = 0 q loss by Cheeto + q gain water = 0

Copper plates out on a strip of zinc immersed in a solution of aqueous copper(II) sulfate.

The apparatus consists of a fixed volume metal sphere, which contains a gas, connected to a large pressure gauge. The pressure of the sample of gas varies directly as a function of temperature.

Compares conductivity of strong and weak acids and bases.

Magnesium burns brightly in air.

The end of a long aluminum bar exerts 14 psi.