Why does increasing the concentration of a reactant in solution increase the rate of reaction?

There are more particles in the same volume, so more frequent collisions

How does raising the temperature increase the rate of a reaction?

Particles move faster, colliding more often and with more energy

It has a larger surface area for collisions

A substance that speeds up a reaction without being used up

The temperature of the mixture falls

the particles are squeezed closer, so they collide more often

It speeds up the reaction and can be reused because it is not consumed

14questions. Pick an answer and you'll see why right away.

What happens to the temperature of the surroundings during an exothermic reaction?
On an energy level diagram for an endothermic reaction, where are the products?
Which of these is an exothermic reaction?
Why does increasing the concentration of a reactant in solution increase the rate of reaction?
How does raising the temperature increase the rate of a reaction?
Why does a powdered solid react faster than a single large lump of the same mass?
What is a catalyst?
Using the oxygen definition, what is oxidation?
Using the electron definition, what is reduction?
In the reaction $\text{CuO} + \text{H}_2 \rightarrow \text{Cu} + \text{H}_2\text{O}$ , which substance is reduced?
In a redox reaction, what is true about oxidation and reduction?
Which change shows an endothermic reaction?
Increasing the pressure of a reacting gas increases the rate because
Why is a catalyst valuable in industry?