Chemistry Rocket Experiment

Topics: Carbon dioxide, Acid, PH Pages: 5 (1152 words) Published: April 6, 2014

International Baccalaureate

Name of the experiment

Candidate Name: Ege Seferoglu
Candidate Number:
School Number: 52680
Class: 11-G

AssesmentCriteria: P- DCP - DEC

Aspect 1
Aspect 2
Aspect 3

Definingthe problem andselectingvariables
Developing a methodforcollection of data

/ 6

Data collectionandprocessing

Aspect 1
Aspect 2
Aspect 3

Processing data

/ 6

Discussion, evaluationandconclusion

Aspect 1
Aspect 2
Aspect 3

Evaluatingprocedure(s) andsuggestingimprovements

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NaHCO3 and vinegar will be used to shoot a cork out of a bottle to show that some acid-base reactions generate gases like CO2. It’s a voice-activated chemical reaction. Students will remove a stopper and speak into a flask containing base and an indicator that will change color once enough CO2 is introduced from the students’ breath. Further color changes from basic to acidic conditions will be shown using a basic solution, universal indicator and solid CO2. Reaction of metals and acid will be shown with Mg and Sprite.

Empty 1L plastic soda bottle with label removed
Tissue paper
vinegar *
sodium bicarbonate (baking soda) *
measuring cup *
teaspoon *
scissors *
water cork with streamers attached by a thumbtack

For the voice-activated chemical reaction: * water (you provide) 250 mL Erlenmeyer flask (will be provided) dropper bottle containing phenol red (will be provided) For the basic solution with universal indicator and CO2: * empty 1 L plastic soda bottle with label removed (you provide) 0.1 M NaOH solution (will be provided) dry ice (solid CO2) (will be provided) Universal indicator (will be provided) 3 beakers (will be provided) For the Mg in Sprite reaction: * flat Sprite or 7-up (you provide) * jar (you provide) magnesium turnings (will be provided) Safety: Students should wear safety glasses. Most of the chemicals used are dilute and not particularly dangerous. Needless to say, none should be consumed (except for the Sprite). If students get any of the chemicals used on their clothes or skin it can be simply washed off in the bathroom. The sodium bicarbonate is not dangerous (but should not be consumed) and can be used to neutralize any vinegar or NaOH solution that gets spilled. The Dry Ice (solid CO2) is very cold, −78ºC or −108ºF. It can give anyone touching it frostbite relatively quickly. DO NOT LET THE STUDENTS TOUCH OR PLAY WITH THE DRY ICE! All chemicals, except for the dry ice, can be safely washed down a bathroom sink. Objectives/Chemistry:

First explain to the students that scientists write down what they observe and that they must do the same when you perform the demos. As you perform the demos, you should ask the students for examples of acids and bases. If they need help, explain that every day we come into contact with some weak acids (like vinegar, citrus juices, Vitamin C and soft drinks) which are usually sour tasting and weak bases (like soaps, detergents and many cleaning products) which feel slippery to the touch. Next, explain that acids and bases are chemical opposites. When we add them together, they may react violently. Then do the rocket reaction (see the procedure section). Tell them that vinegar is an acid and baking soda (NaHCO3) is a base. Explain why the cork shoots out of the bottle because of the production of CO2 gas which increases the pressure. For your information, the chemical reaction that takes place is: NaHCO3(s) + CH3COOH(aq) CH3COONa(aq) + H2CO3(aq) CO2(g) + H2O(l) Ask the students what gas do they exhale? It is carbon dioxide (CO2). Tell them that we can use their breath to carry out an acid-base reaction....
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