Is a catalyst used up, or does it just help?
A catalyst helps a reaction finish faster without being used up. Learn the one quantity it lowers, and what it never changes.
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1 lesson for “Reaction rates and catalysts”
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How much does one apple cost?
Ben paid $2.40 for 3 apples and divided 3 by 2.40, getting 1.25. He computed apples per dollar instead of dollars per apple.
Try this lessonSynthesis or combustion: how can you tell?
A reaction can be named by its pattern, not its colors or smells. Look at how many substances come in and how many go out.
Try this lessonWhat is the second product of acid plus base?
Acid and base do not vanish. Their ions trade partners and become a salt and water. Fill in the two products.
Try this lessonIs it 60 over 45 or 45 over 60?
If 60 g was expected and 45 g appeared, is that 75% or 133%? The order of the fraction is the whole lesson.
Try this lessonIs it rise over run or run over rise?
Kai found the slope through (2, 3) and (6, 11) and wrote 1/2. He divided the run by the rise.
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