1 / 8

Major Concepts: Activity 38

Major Concepts: Activity 38. A solution exists when one substance, the solute (solid), dissolves in another, the solvent (liquid). A solution is clear. Solubility, the amount of a substance that can dissolve in a particular solvent, such as water or ethanol, varies from substance to substance.

mari-solis
Télécharger la présentation

Major Concepts: Activity 38

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Major Concepts: Activity 38 • A solution exists when one substance, the solute (solid), dissolves in another, the solvent (liquid). A solution is clear. • Solubility, the amount of a substance that can dissolve in a particular solvent, such as water or ethanol, varies from substance to substance. • A solution reaches saturation when no more of the solute can dissolve. • Water can dissolve many different solutes and is often called the universal solvent.

  2. Major Concepts: Activity 45 • Chemical reactions often cause easily observable changes. • When a chemical reaction produces an insoluble product, that product appears as a precipitate. • Precipitation reactions can be used to treat wastewater containing dissolved substances.

  3. Major Concepts: Activity 46 • Acids and bases have characteristic physical and chemical properties. • A pH indicator is a chemical that changes color in response to the concentration of hydrogen/hydronium ions (H+ or H3O+) and hydroxyl (OH-) ions present. • A neutral solution is neither acidic or basic.

  4. Activity 46 Follow-up • Acids taste sour, sting to the touch, and turn pH paper and universal indicator red. • Bases feel slippery or soapy, and turn pH paper and universal indicator blue. • Acids are more common in foods. Bases tend to taste bitter. • Diluting an acid or a base eventually results in a neutral solution.

  5. Analysis Question #1

  6. Activity 47: Acids, Bases, and the pH Scale Read pg. C-86 Challenge: What is pH, and how does it affect the quality of water?

  7. Background information: • Glue in the “pH concept map” • The pH scale is non-linear • pH 3 is ten times more acidic than pH 4 Procedure: • Read pages C-87 to C-89 and fill in the directed reading table Data/Observation: • Copy “Directed Reading Table: Acidic, Basic, and Neutral Solutions”

  8. Directed Reading Table: Acidic, Basic, and Neutral Solutions

More Related