Could I use "The intensity of muscle contractions" as a factory that may affect how quickly muscles become fatigued? I'm doing an experiment, but is this a legitimate idea? Would my hypothesis be "The intensity of muscle contractions in the body affects how quickly muscles become fatigued"?
Independent variable - Type of catalyst
Dependent variable - Oxygen produced
Control Variable - Temperature at which the reaction occurs
Mass of the catalyst
Surface area of the catalyst
anythin else?
So i SHOULD state on equipment "A selection of catalysts e.g. ...then the ones i just mentioned"?
This is my equipment so far
Gas syringe
Rubber bung
Delivery tube
3 x Different catalysts E.g. ...the 3 catalysts
Hydrogen Peroxide
Measuring Cylinder
Conical flask
stopwatch
Goggles
Clamp stand...
So I should list my three catalysts that I want to use?
Is it manganese oxide or manganese dioxide
I keep reading that they are the same but clearly not. Which should I use in an investigation? Manganese oxide?
Another query too: Should I say, for the equipment, "A selection of catalysts" or just three catalysts that I want to use(Manganese Oxide, zinc oxide, copper oxide) - wouldn't this make it more reproducible?
Hmm. Well in the case of my objective I don't think it is necessary for me to do one as instructed. Thanks, though; I'll remember for the future.
I am using these equipment, but I would like some things queried.
Rubber bung
Delivery Tube
Gas Syringe (do I need to state it's volume?)
Conical...
What do you mean by Negative Control? Also, what do you mean by a preliminary experiment. One before hand? But what's the purpose for that. And what catalysts would you test for it?
I'm not doing the experiment without a catalyst, though. I am just testing three catalysts to find the rate of reaction and which works the best. But
So you mean basically measure how long it takes to get to 10ml or even less and then comparing?
I was thinking maybe instead of measuring every 5 seconds, I could time how long it takes for 25ml of gas to be produced. Would this be a good idea? Because I could then work out the reaction rate by diving the 25 by the time taken in seconds using a stopwatch. Do you have any better idea that...
Thank you. I am going to use the rate at which Oxygen is produced using a gas syringe. Shall I measure the product of Oxygen every 5 seconds or not because there will be three different types of catalysts I'm going to use?
Also I need a hypothesis. Will this just be "The rate of reaction is...
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experiment for testing type of catalyst on reaction rate?
I need an experiment (just the method) Where I can test the reaction rate of changing the catalyst type
I need about 3 differnet...