out of these conditions, which would result in fastest reaction?

Question

a. 2.0M HCL, powedered CaCO3 chip, 50 degrees celsius

b. 6.0M HCL, CaCO3 chip, 25 degrees celsius

c. 6.0M HCL, powdered CaCO3, 50 degrees celsius.

d. 2.0M HCL, CaCO3 chip, 50 degrees celsius.

Im guessing C because the more the temperature, the faster the reaction?

Answer 1

I would choose c also; however, look at a. It has 50 C too.

Answer 2

Thanks so much, does the amount of acid also matter? like 2.0M or 6.0M? and if its powdered that also increases the reaction rate right?

Answer 3

Yes. powdered (more surface area) is better, higher concn is better. higher T is better.
I notice a says powdered, chips and that's confusing. It doesn't matter though because c wins for all three being higher.