Problem: Which of the following reactions is most likely to proceed at the greatest rate?A. Zn(s) + S(s) → ZnS(s)      B. H2(g) + I2(s) → 2HI(g)C. Cu(s) + Cl2(g) → CuCl2(s)D. 2KOH(aq) + H2SO4(aq) → 2H2O(l) + K2SO4(aq)

FREE Expert Solution

We’re asked to determine which of the given reactions is most likely to proceed at the greatest rate.


Reaction rates are influenced by 4 factors:

1. Concentration: for a reaction to occur, molecules must collide.

Increasing the number of molecules in a container increases their collisions and thereby causes the rate to increase.

2. Surface area: the greater the surface area, the greater the chance for the reaction to occur and the faster the reaction can occur.

The surface area depends on the geometry, phase or structure of the compound.


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Problem Details

Which of the following reactions is most likely to proceed at the greatest rate?

A. Zn(s) + S(s) → ZnS(s)      

B. H2(g) + I2(s) → 2HI(g)

C. Cu(s) + Cl2(g) → CuCl2(s)

D. 2KOH(aq) + H2SO4(aq) → 2H2O(l) + K2SO4(aq)

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Rate of Reaction concept. You can view video lessons to learn Rate of Reaction. Or if you need more Rate of Reaction practice, you can also practice Rate of Reaction practice problems.