1. Aim of the experimentThe aim of this experiment called ‘gas bags’ is toinvestigate four bottles filled with acid, bi-carbonate and water and see how they react toeach other.
2. MaterialsThe materials used : 6 teaspoons of sodium bicarbonate 6 teaspoons of tartaric acid 3 cups of non-acidic water 1 cup measure 1 teaspoon 4 pieces of paper towel 4 bottles the same size 4 balloons 1 labeling pen 1 funnel masking tape
3. Steps used1. Label the 4 bottles with the following• Bottle 1: bicarb + acid• Bottle 2: bicarb + water• Bottle 3: acid + water• Bottle 4: bicarb + acid + waterLabel the balloons 1,2,3 and 4.2. Add 2 teaspoons of sodium bicarbonate to balloons 1,2 and 4 by placing the funnel into the opening of each balloon.3. Wipe funnel carefully with a piece of paper towel. Discard paper towel.4. Add 2 teaspoons of tartaric acid to balloons 1,3 and 4 by placing the funnel into the opening of each balloon.
4. Steps continued..5. Wipe funnel carefully with the second piece of paper towel. Discard paper towel.6. Add 300ml of water to bottles 2,3 and 4 by placing the funnel into the mouth of each bottle.7. Have one team member carefully fit the opening of each balloon over the mouth of their corresponding bottle while another holds down the balloon so that no powder falls in. Pull the stem part of the balloon down so that it will not come off easily. If it is loose, stick it down with a piece of masking tape to make it airtight.8. Carefully upend Balloon 1 so that its contents fall into Bottle 1. Mix the contents gently. Observe the bottle carefully, and record your observations in your science journal.9. Repeat step 8 for each of the bottles.
5. Observations-Bottle 1Bicarb + acidThe bicarbonate and acid did not have anyreaction when mixed together.
6. Observations- Bottle 2bicarb + waterThe water went cloudy then the bicarbonatesunk to the bottom of the bottle.
7. Observations- Bottle 3Acid + waterThe acid sunk straight to the bottom of thebottle and had no reaction.
8. Observations- Bottle 4Acid + Water + bicarbThe Acid + Water + bicarb fizzed up in secondsand the balloon blew up. Soon after it stoppedfizzing and the balloon deflated.
9. Questions1. What are bubbles?Bubbles are round pockets of air or other liquids.2. Do the bubbles come from the sodium bicarbonate? Why doyou think that?Yes, the bubbles come from sodium bicarbonate because theacid and the water did not fizz but with bicarb it fizzed.3. Do the bubbles come from the tartaric acid? Why do youthink that?no, because the acid did not react when mixed with the water.4. When do the bubbles appear? Why do you think they onlyappear then?When everything was mixed the bubbles appeared. The bubblesonly appeared then because in every ingredient there is differentthings which react to each other.
10. Questions continued..5. What do you think inflated the balloon? the reaction of the Acid + Water + bicarb which fizzed up andthe gases blew up the balloon.6. Predict what you think will happen if you mix Bottle 2 (bicarb+ water) and Bottle 3 (acid + water)?I think it would fizz up like bottle four and react in a veryinteresting way.
11. ConclusionSeeing all the results I saw I would not changeanything.