Honors Chemistry Week 7
Make sure to take notes on the videos. We are taking a practical look at chemistry in action
Vocabulary: (know the definitions)
- Limiting Reactant
- Conversion factor
- Excess Reactant
- Molar Mass Formula (g/moles)
Day 1: Watch the Video (Happy Memorial Day)
- Video: How to Calculate Molar Mass Practice Problems
- Video: Converting Between Moles and Liters of a Gas at STP
- Video: Grams to Liters
- Video: Gas Stoichiometry: Equations
Day 2: Watch the Videos
- Video: DRAG RACING CO2 Powered Car VS Supercharged Coke Can
- When we have fire, a combustion reaction, what are the products?
- Which one moved the car?
- Why did one car move faster then the other?
- Video: DIY Airplane Powered by 4x CO2 Cartridges
- What part did engineering play in how well the plane worked?
- Note: Don’t say “a lot” be specific
- Since you don’t have access to CO2 cartridges, we will make our own CO2 by mixing vinegar and baking soda.
- What part did engineering play in how well the plane worked?
- Video: Jet Powered Boat Science Experiment
- Video: DIY Baking Soda & Vinegar Rocket!
- In the two vinegar and baking soda videos did they use the same ratio of vinegar to baking soda?
- Why or why not?
- Activity: Wait, Weight Don't Tell Me
- Did you guess correctly? Remember it’s the law of conservation of Mass.
- Can you use the day one math to figure out how much you should use so you don’t have a limiting or excess reactant?
- Let’s assume the given is 5 g of vinegar (C2H4O2)
- The balanced equation is C2H4O2 + NaHCO3 -> CO2 + Na2 CO3 + H2O
- So now I must put a new measurement in for the amount or 5g of C2H4O2, while the equation was balanced now its not.
- Rebalance the equation and figure out the ratio for ever 5g of vinegar how many g of baking soda do I have?
- Now if you were making a fuel for your boat you would replace the 5 with however many grams of vinegar you are going to use; that is your new given.
- Start with your given, how much vinegar do you want to use, you want to figure out how much baking soda you need to balance it.
- Hint: amount of vinegar in ml x conversion factor = amount of grams of baking soda.
- Once you figure out the ratio you can change the amount of vinegar and just use the ratio to figure out how much baking soda you need.
- Example a ratio of 5g/1g is the same as 15g/3g. Do you see the pattern and why ratios are such a help to us?
Day 3
- Video: Mr. B's 3 Steps to Building
- Decide if you want to build a boat, rocket or car.
- Remember a thin wall is easy to break
- Watch a video to figure out the supplies you will need.
- Get the materials or figure out replacements
- Decide if you want to build a boat, rocket or car.
Day 4
- Making the fuel: This is very important
- What is your ratio of vinegar to baking soda?
- _______ g to _______ ml
- Making the Nozzle
- Video: Variable nozzle for a balloon rocket
- What happens if the hole is to big?
- What happens if the hole is to small?
- Video: Variable nozzle for a balloon rocket
- Fuel Delivery System
- Video: Can Baking Soda and Vinegar Launch Rockets
- Does how you mix the fuel make a difference in how it works.
- How can you control it?
- Video: Can Baking Soda and Vinegar Launch Rockets
Day 5
If we were in school, we would pick teams and build a CO2 boat. You would then race them against other classes.
- We had Memorial day for day 1, if you just get all the videos and math done and want to build the boat this weekend and show me next week, I understand.
- I do want to see video of you launching your vehicle!
Write up a short paper explaining what you did each day this week and what you learned.
- Take a picture and send it to: bartlett@wcskids.net
- Make sure to include your name, hour and week 7.
You're done for the week!
Make sure I get your work by Saturday