1 / 14

pH Scale

pH Scale. Neutral = 7.0 (Water). Increases by a factor of 10X. Increases by a factor of 10X. What makes acids and bases?. Preparing the pH indicator (Cabbage Juice). Obtain a chunk of red cabbage. Use scissors to shred the cabbage into one of your two beakers.

colleen-dunn
Download Presentation

pH Scale

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. pH Scale Neutral = 7.0 (Water) Increases by a factor of 10X. Increases by a factor of 10X.

  2. What makes acids and bases?

  3. Preparing the pH indicator (Cabbage Juice) • Obtain a chunk of red cabbage. • Use scissors to shred the cabbage into one of your two beakers. • Rinse the scissors with water, but DO NOT DRY THE SCISSORS. • Add distilled water to the shredded cabbage until the water level is at the 200mL mark. • Wait 20-25 minutes. • Use the coffee filter and funnel to filter out the pieces of cabbage. Pour the cabbage juice into the second beaker. • Compost Cabbage, coffee filters and paper towels. • Rinse the beaker and clean up.

  4. Relative pH Color Scale More Acidic---Less Acidic----Neutral---Less Basic---More Basic

  5. Actual Results (End of Class) Coffee ≈ pH 5 Milk ≈ pH 6.5

  6. Actual Results after 24 hours

  7. Litmus Paper pH Indicator (Before) R=Red B=Blue N=Neutral

  8. Litmus Paper pH Indicator (After) R=Red B=Blue N=Neutral

  9. Red is usually associated with acids. • Blue is usually associated with bases. • Hydrangeas can change color based on the pH of the soil.

  10. Neutralization:Acid + Base = Salt + Water Hydrochloric Acid HCl + Sodium Hydroxide + NaOH → Sodium Chloride →NaCl + Water +H20

  11. The old vinegar (acetic acid) and baking soda (sodium bicarbonate) trick: Reactants Products Salt

  12. Acid + Base =Neutralization

  13. Sulfuric Acid Mud Pot and Lake

  14. KC4H5O6 (Cream of tartar)

More Related