Tag Archive for 'chemistry' Page 2 of 5

Orange Clock ScholAR Demonstration

Published in Lesson Plans. Tags: batteries, chemicals, chemistry, electrochemistry, redox reactions, scholar, voltaic cells.

Purpose
To illustrate several principles of batteries by using orange juice to power an electric clock.

Materials

Magnesium strip or ribbon
Copper strip
Orange juice
Steel wool (not a soap pad)
Electrical leads (with Alligator Clips)
Battery powered clock (variety that requires a single 1.5 V AA battery)
250 mL beaker

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Joke Juice ScholAR Demonstration

Published in Lesson Plans. Tags: chemicals, chemistry, cross linking, polymers, scholar.

Purpose
Illustrate the effect of cross-linking on a polymer.

Materials

Guar gum
Borax, sodium tetraborate decahydrate, Na2B4O7 · H2O
Red food coloring
Glass stirring rod
Empty glass juice bottle (~300 mL)
100 mL graduated cylinder
100 mL beaker
Electronic balance

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Iodine Clock Reaction ScholAR Demonstration

Published in Lesson Plans. Tags: chemicals, chemistry, rates of reaction, reaction rate, scholar.

Purpose
To illustrate a time delayed reaction which leads to the exploration of several factors which effect reaction rate.

Materials

Soluble starch
Potassium iodate, KIO3
Sodium hydrogen sulfite (sodium bisulfite), NaHSO3
Sulfuric acid, H2SO4 (1.0 M)
2 ea. 1L Erlenmeyer flask
2 ea. 400 mL beaker
1 ea. 25 mL and 100 mL graduated cylinder
Stirring rod
electronic balance
optional - timer

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Hydrogen Rocket ScholAR Demonstration

Published in Lesson Plans. Tags: balancing equations, chemicals, chemistry, combustion, rocket, scholar, synthesis reaction.

Purpose
To illustrate a synthesis reaction involving reactants in specific proportions.

Materials

Hydrogen gas (or Calcium metal and water)
Oxygen gas (or hydrogen peroxide and manganese dioxide)
500 mL plastic pop bottle
500 mL graduated cylinder
Plastic dish tub or displacement (pneumatic) trough

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Glow in the Dark ScholAR Demonstration

Published in Lesson Plans. Tags: chemicals, chemiluminescence, chemistry, scholar.

Purpose
Illustrate a chemical change involving chemiluminescence.

Materials

Sodium carbonate 10-hydrate, Na2CO3 · 10H2O
Sodium bicarbonate, NaHCO3
Luminol (3-aminophthalhydrazide)
Ammonium carbonate monohydrate, (NH4)2CO3 · H2O
Copper (II) sulfate 5-hydrate, CuSO4 · 5H2O
2 - 1 L Erlenmeyer flask
2 - 400 mL glass beaker
100 mL graduated cylinder
Electronic balance

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