Middle School Chemistry: Temperature Changes in Dissolving

Students will conduct two chemical reactions: endothermic and exothermic. They will see an animation that shows that it takes energy to break bonds and that energy is released when new bonds are formed, and use that animation to explain...

Explore this animation to learn why water dissolves sugar.

Use these demostration video clips to help understand the energy changes in some chemical reactions.

Six middle school chemistry lessons about the periodic table and bonding complete with handouts and animations.

Students observe and describe, on the molecular level, how heating and cooling affect the motion of molecules in a solid.

Students first observe a solubility test between salt and sugar. Next, they design their own solubility test with four known crystals and an unknown to discover the identity of the unknown.

Explore this animation to learn why water dissolves salt.

Learn how the molecular movement in different temperature water affects the density of the liquid.

Is there more to evaporation than just less liquid? Show young scientists the energy transformation that occurs during a phase change through a series of simple experiments. Lab partners place drops of water, ethanol, and ethoxyethane on...

Nine exemplary chemistry lessons about the water molecule and dissolving complete with handouts and animations.