Im doing a science fair for my school . So i would like to know does which works...

If you just use our answers then that's not "proof" that just a bunch of people's personal opinions and doesn't prove anything... there's an old saying "the proof is in the pudding". The best thing to do is take pics of say your bathroom or kitchen with a before pic and after pic one for ajax and do the same for comet and compare the results... or do a sort of side by side dare to compair thing like put up a piece duct tape on the sink show a before picture and then use ajax on one side and comet on the other and compare results... hope this helps :)
 
If you just use our answers then that's not "proof" that just a bunch of people's personal opinions and doesn't prove anything... there's an old saying "the proof is in the pudding". The best thing to do is take pics of say your bathroom or kitchen with a before pic and after pic one for ajax and do the same for comet and compare the results... or do a sort of side by side dare to compair thing like put up a piece duct tape on the sink show a before picture and then use ajax on one side and comet on the other and compare results... hope this helps :)
 
For a science fair project you need to do an experiment! Go to the local hardware store and get a bunch of scraps of linoleum tile. stain them with something sticky like coffee with a LOT of sugar. Get a bucket of warm water and put some comet in. wipe a tile once with the comet solution, wipe another twice, another 3 times etc... probably go up to 5-8 wipes. THen do the same with the other cleaner. glue all of the pieces to some poster board and label them. Write a summary of what you found (eg. the 4th wipe with comet appears the same as the 5th wipe of ajax or whatever.)

if the coffee solution comes off too easily, use a marker. You may have to do 5 wipes, 10 wipes, 15 wipes, 20 wipes with a marker.
 
Well, I don't know the exact chemistry of the products, so I can't directly speak to their efficacy.

However, if you could break it down into their mineral content, then you can determine which works better by seeing which product's mineral (simplifying it to a single mineral) is sturdier, and will thus have more scrubbing power.

That assumes a uniform distribution of two minerals.

To really found out, in a mineralogy perspective, you'd also have to determine the concentration of each mineral in the product, and use the concentration, with the hardness, to calculate which is more efficient.

This is a common lab question for all college introductory mineralogy labs.
 
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