Paint

Activities will be done during the study of Reaction Types and Product Prediction

Day 1 Experimenting with Paints - Similarities and Differences

Day 2 Preparation of Pigments

· Black - combustion C₂₀H_42(s) + O_{2 (g)} à C_(s) + H₂O _(g) + CO_2(g)

· White - double displacement Na₂CO_3(aq) + CaCl_{2 (aq)} à CaCO_3(s) + 2NaCl_(aq)

· Red - double displacement FeCl_3(aq) + 3NaOH_(aq) à Fe(OH)_3(s) + 3NaCl_(aq)

- decomposition 2Fe(OH)_3(s) + heat à Fe₂O_3(s) + 3H₂O_(g)

Day 3 Preparation of Binders

Each group of students will prepare two different binders

Day 4 Making Paint (paint = pigment + binder)

Students will use inquiry to determine which combination of pigment and binder make the best paint. Each group of students will be assigned one specific pigment and decide which of the two binders they prepared makes the best paint. They will also have to design the best procedure for mixing the pigment and binder. For example, is it best to add the binder to the pigment or the pigment to the binder? Students will then prepare enough of the paint for the class.

Day 5 Art Day. Students will use the paints they have prepared to create an illustration of a chemistry concept, topic or idea.

Day 6 Visit from Union Carbid

Preferrably the chemists form Union Carbid will visit on Day 4.

Paint

Activities wull be done during the study of unsaturated, saturated and supersaturated solutions.

Day 1 Preparation of an unsaturated, a saturated and a supersaturatd solution.

Day 2 *Addition of solute crystal to each prepared soluton and make observations.

*Students will use watercolor paint pigments to investigate the effects of temperature on solution saturation. Students will prepare saturated solutions of paint pigement in three temperatures of water, recording the amount of pigment required to make each saturated solution.

*Students will use the solutions thay made and illustrate the effect of temperature on solubility