Which would slow down a reaction that is occurring in a solution at 25 degrees Celcius? Question 11 options:

increase the air pressure above the solution

add a catalyst

put the solution over ice

add 10mL of water at 30 degree Celcius

Which change will decrease the number of effective collisions during a chemical reaction? a. adding a catalyst b. increasing the surface area c. decreasing the temperature d. increasing the reactant concentrations e. increasing the volume of the reactants