Purpose
To illustrate an endothermic reaction involving reactants in the solid state.
Materials
- Barium hydroxide 8-hydrate, Ba(OH)2·8H2O
- Ammonium thiocyanate, NH4SCN
- 500 mL Erlenmeyer flask with rubber stopper
- Wood board
- Electronic balance
Tag Archive for 'chemistry' Page 3 of 5
Purpose
To illustrate the principles behind fireworks and how they relate to the Bohr Rutherford model of the atom.
Materials
- Potassium chlorate, KClO3
- Sucrose (ground sugar)
- Concentrated sulfuric acid, H2SO4 [18 M]
- Copper (II) chloride, CuCl2
- Strontium nitrate, Sr(NO3)2
- Iron powder, Fe
- Heavy wall combustion test tube
- Support stand with test tube clamp or beaker with
- Electronic balance
- 4 ea. 50 mL
- 400 mL
Purpose
Illustrate the hydrophobic effect.
Materials
- Hydrophobic sand
- Water
- Filter paper
- 2 ea. 400 mL beaker
Purpose
To illustrate the absorbing power of the polymer found in diapers.
Materials
- Acrylic sodium salt polymer (A.S.A.P.), diaper powder, potassium polyacrylate
- Styrofoam cup
- Bottle of water
- Piece of cardboard
Purpose
To illustrate the effect of pH change on indicator color.
Materials
- Thymolphthalein
- Ethanol
- Sodium hydroxide solution, NaOH (0.1 M)
- 100 mL beaker or
