1. Today…. Acids & Bases (1.4b) BINGO Rocket demo! DOL - Worksheet

2. Make Your BINGO boards!!! Sour Bitter 7 0  14 1 x 10 -14 1.6 1.9 x 10 -9 Base Red Blue Acidic Neutral Donors Acceptors Salt & Water 7.3 2.5 x 10 -4 1 x 10 -7 11.2 Basic FREE HI HMnO 4 Arsenic Acid Nitrous Acid

3. BINGO 1. What is the formula for Hydroiodic Acid? 2. How do acids taste? 3. A neutral pH has a value of? 4. What color do bases turn universal indicator? 5. When [H+] < [OH-], the solution is? 6. [H+] = 5.4 x 10 -8 M, what is the pH? 7. [H3O+] in water is? 8. pH = 8.7, What is [H+]? 9. KOH is a(n)? 10. What is the name of HNO2?

4. BINGO 1. What do bases taste like? 2. If [H+] = 5.7 x 10^-12 M, What is the pH? 3. What is the range for pH? 4. When [H+] = [OH-], The solution is? 5. Acids are proton _____?____ 6. What is the formula for Permanganic Acid? 7. If pH = 3.6, What is the [H+]? 8. [H+] x [OH-] = ? 9. What color do acids turn universal indicator? 10. What is the name of the acid, H3ASO4?

5. BINGO 1. When an acid reacts with a base, what products form? 2. Bases are proton ___?____ 3. If [H+] = 2.5 x 10 ^-2 M, What is the pH? 4. When [H+] > [OH-], The solution is?

6. Film Canister Rocket Demo Objective: Become familiar with phase changes and chemical reactions of acids and bases HCO3 + H → ?

7. What Happens? When a seltzer tablet dissolves in water, a chemical change takes place and carbon dioxide (C02) is formed. Most seltzer tablets contain a base called sodium bicarbonate (baking soda) and dehydrated citric acid. When the tablet is placed in contact with the water, the citric acid combines with the baking soda. Acids and bases undergo a chemical reaction when they mix, producing a gas and salt. In the closed container, the newly created gas has no place to go since the closed container is already full of air. This is like trying to add more air to a balloon that is already full. The pressure inside the container eventually escapes by blowing up the balloon, or blowing off the lid. This is the same thing that happens when you open a can of soda. You notice the fizz that it makes. The carbon dioxide rushes out, making a whoosh sound.

8. In your Notebook….. Hypothesis: Make a hypothesis as to what will happen inside a film canister when water is added to an alka-seltzer tablet 1. How high do you estimate the rocket will fly?

9. Observation Questions: 1. Look back at you hypothesis. Was is correct? How high did the canister go? 2. What happened when the alka-seltzer was added to the water? What action happened inside the film canister? 3. What was the reaction of our rocket to this reaction? 4. How could you modify the amounts of water, alka- seltzer or both to improve the flight of the rocket? 5. How could changes in the weight of the rocket affect the height it travels, keeping the amount of water and alka-seltzer constant each time?

10. Materials: 1. One empty 35mm plastic film canister and lid. These are getting harder to find, but stores that develop film should have some. (The white canisters work much better than the black ones do.) If you have trouble finding canisters, you can get them HERE.HERE 2. One fizzing antacid tablet (such as Alka-Seltzer - Get this from your parents) 3. Water 4. Safety goggles

11. Procedure: 1. Put on those safety goggles and head outside - no really, when this works, that film canister really flies! If you want to try the indoor version, do not turn the canister upside down in step 5. 2. Break the antacid tablet in half. 3. Remove the lid from the film canister and put a teaspoon (5 ml) of water into the canister. Do the next 2 steps quickly 4. Drop the tablet half into the canister and snap the cap onto the canister (make sure that it snaps on tightly.) 5. Quickly put the canister on the ground CAP SIDE DOWN and STEP BACK at least 2 meters. 6. About 10 seconds later, you will hear a POP! and the film canister will launch into the air! Caution: If it does not launch, wait at least 30 second before examining the canister. Usually the cap is not on tight enough and the build up of gas leaked out.