Chapter 5, Lesson 5 Multimedia
All Four Crystals
- Epsom salt is an ionic compound. There is a positive magnesium ion (Mg2+) and a negative sulfate ion (SO42−). Polar water interacts with these oppositely charged ions to dissolve the Epsom salt.
- MSG is made of a positive sodium ion (Na+) and a negative glutamate ion, which has the molecular formula (C5H8NO4−). Polar water interacts with these oppositely charged ions to dissolve the MSG.
- Salt—sodium chloride is an ionic compound. There is a positive sodium ion (Na+) and a negative chloride ion (Cl−). Polar water interacts with these oppositely charged ions to dissolve the salt.
- Sucrose is not an ionic compound. Sucrose has many O–H bonds, which give it positive and negative polar areas. These areas attract other sucrose molecules and hold them together in a crystal. These polar areas interact with water and cause entire sucrose molecules to separate from one another and dissolve.
- Lesson 1: Water is a Polar Molecule
- Lesson 2: Surface Tension
- Lesson 3: Why Does Water Dissolve Salt?
- Lesson 4: Why Does Water Dissolve Sugar?
- Lesson 5: Using Dissolving to Identify an Unknown
- Lesson 6: Does Temperature Affect Dissolving?
- Lesson 7: Can Liquids Dissolve in Water?
- Lesson 8: Can Gases Dissolve in Water?
- Lesson 9: Temperature Changes Dissolving
- Lesson 1: What is a Chemical Reaction?
- Lesson 2: Controlling the Amount of Products in a Chemical Reaction
- Lesson 3: Forming a Precipitate
- Lesson 4: Temperature and the Rate of a Chemical Reaction
- Lesson 5: A Catalyst and the Rate of Reaction
- Lesson 7: Energy Changes in Chemical Reactions
- Lesson 8: pH and Color Change
- Lesson 9: Neutralizing Acids and Bases
- Lesson 10: Carbon Dioxide Can Make a Solution Acidic