Middle School Chemistry: Why Does Water Dissolve Sugar?

There are many people who simply don't like the taste of water, whether served hot, cold, or fresh ... so what about day-old water? The video explores why drinking water that sits out overnight tastes stale to some people the next...

Young scholars discover the concept that density is a characteristic property of water by measuring the volume and mass of water and calculating its density.

Explore this animation to learn why water dissolves salt.

Students use their own model of a salt crystal and water molecule to show how water dissolves salt. Then, they relate their observations to the structure of salt, water, and alcohol on the molecular level.

Lesson plan in which learners design an experiment to determine if different types of liquids affect the amount of dissolution of an M&M candy shell.

Discover how the molecular make-up of water affects its density.

Students develop their own water molecule model to help them understand the idea that water has a slight positive charge at one end of the molecule and a slight negative charge at the other.

Students see a demonstration of a color change using universal pH indicator and then change the concentrations of an acid and a base using a universal indicator to test the pH of the resulting solutions. Through an animation, they see...

Investigate why a charged object is attracted or repelled by another charged object. Explore the concept that the attraction between positive protons and negative electrons holds an atom together.

Based on experimental observations, students describe, on the molecular level, why the liquid in a thermometer goes up when it is heated and down when it is cooled.