The acid-base reactions in solution: Crash Course Chemistry # 8
In a real automobile safety restraint system, the air bag is a plastic bag of about 65 0 L which fills with nitrogen as soon as a sensor, it says that has been greatly reduced momentum to the before the car nitrogen is produced by the decomposition of sodium azide NaN3 fast, which produces nitrogen gas N2.
In this lab, we will create our own airbag technology using sodium bicarbonate baking soda and vinegar acetic acid Your task is to find the right amounts of sodium bicarbonate and acetic acid to use to create the right amount of carbon dioxide gas to fill the bag If done correctly, your bag is complete but not open pop should not be as all the sodium bicarbonate or acetic acid left in the bag.
Part 1 Procedure Before you start, look at the data table in which you will record the amount of acid, the amount of sodium bicarbonate, a description of how the inflated bag, and if there was acid acetic acid or sodium bicarbonate remains.
1 Basically, you're always going to have the same amount of acetic acid in the bag 25 ml Add 25 ml of acid in the bag.
2 0 Then measure 5 grams of sodium bicarbonate and record in the data table Place the sodium bicarbonate in a small piece of tissue.
3 Add sodium bicarbonate enveloped in a tissue in the bag flatten the bag to remove air and seal the bag as quickly as possible as soon as acetic acid absorbs through tissue, chemicals will begin to react and bubbles; the gas produced is carbon dioxide CO2 The bag should begin to swell.
4 When the bubbling stops, mix the ingredients around to be sure the reaction is complete.
5 So how test the bag is inflated by pinching Mirroring a description in the data table.
6 If all sodium bicarbonate appears to be gone, open the bag and add a small amount of sodium bicarbonate to see if more bubbles form If they do, then there was still some acetic acid left in the bag Otherwise all the note reacted acetic acid in the data table if there was acetic acid left in the bag.
7 Repeat this process by increasing the amount of sodium bicarbonate 5 grams 0 until all the acetic acid is used, indicated by the presence of sodium bicarbonate in the bag because there was no 'leaves acetic acid react with it.
Part 2 Now you will put that knowledge to the test of a crash test you design and build a vehicle for your crash test dummy, a raw egg The goal is to build your car here so that he will protect the egg from breaking even fall from a height of 2 meters.
A container for the egg e g a small cardboard box or a large butter tub.
Procedure Follow the steps below using sodium bicarbonate to acetic acid, which inflated the bag without acetic left or sodium bicarbonate on acid You wouldn t like acid in your air bag voulez- you.
1 Inflate one or two bags, according to what you think would work best 2 Place the inflated bag s and egg in the container 3 2 meter drop 4 Check Does your passenger survived the accident.
Analysis and conclusions 1 How much sodium bicarbonate was added when there seems to be no acetic acid or sodium bicarbonate left after the reaction.
2 Do this amount of sodium bicarbonate when there was no acetic acid or sodium bicarbonate acid left inflate the bag completely Otherwise, how could you change the quantities of sodium bicarbonate and acetic acid such that the bag is full, but without reagents left over.
3 What reagents Use question 2 to help you form a definition for reagents.
6 What changes would you make to your vehicle to further protect your passenger.
7 How is this experience similar to an airbag in a car How is it different.
8 How to determine the correct ratio of reactants assist the actual air bag manufacturers.
It is a science student Dummy Crash Test Lab NetLinks, crash, test, dummy, left acetic acid.