Atoms, Molecules, Ions, Compound Formulas
3.0 Various Props for Demonstrating Atoms, Molecules, Bonding, Mole, Chemical Formulas
Description: Use of objects to visualize concepts of the mole, atomic structure, counting by weighing.
- Mole box (on top shelf of alcove)
- 2” red ball
- Mole of sulfur and mole of sodium bicarbonate (NaHCO3) in Erlenmeyer flasks
- Coffee and aspirin containers
- Jar of rice
- Beakers, different sized balls for count by weighing exercise
- The mole box is a visual aid that represents a volume of one mole of air.
- The moles of sulfur and sodium bicarbonate give an idea of the relative amounts of different materials in a mole.
- The jar of rice and beakers containing different size balls is an exercise that demonstrates why chemists count by weight. It is impractical to count individual rice grains in a jar – there are too many. It is better to weigh the total amount.
References: 1. Bee Botch