What observations would you see when water boils? Is this an example of a physical or chemical change. Explain why.
“When you see water on the stove it will _____. This is an example of a ______ change.
It is a ____change because ___”
Where's the evidence Mini-lab Part II
- Sodium Carbonate (powder)
- Diluted hydrochloric acid
- test tube
- safety goggles
- measuring spoons
- test tube rack
Procedure: Sodium carbonate (powder) + Hydrochloric Acid
1. Using a funnel, put 1.25 mL of sodium carbonate powder into a clean and dry test tube. Record the appearance of the sodium carbonate in the data table.
2. Observe the test tube of hydrochloric acid. Record the appearance of the acid in the data table.
3. CAUTION: Hydrochloric acid can burn you or anything else it touches. Wash spills immediately with water. Tie back loose hair and put on safety goggles and gloves.
4. Make a predication about how you think the acid and the sodium carbonate will react when mixed. Record your prediction in the data table.
5. Using the dropper slowly add the hydrochloric acid to the sodium carbonate powder. You may swirl to mix the contents in the beaker. Record your observations in the data table.
6. Place the used dropper in the neutralizing solution at the back counter.
7. With gloves and goggles still on, take the test tube with the hydrochloric acid and sodium bicarbonate powder to the back sink and carefully rinse out.
8. Place the test tube upside down on the drying rack portion of the test tube rack.
9. Dry gloves with a paper towel to be used for the next class.
Binder check #10
Classes of Elements (3a)
Elements Atomic #’s & Isotopes (3b)
Classifying Substances (3c)
Double & Triple Bond
Atomic Structure (7a)
Friday 8th graders will go to see the movie SELMA for free. Please bring in your signed permission slip.