a catalyst speeds up the reaction
A catalyst can change the reaction energy diagram is that a catalyst speeds up the reaction.
a salt and water are formed
Are we talking about the front wheels or the rear? Have you checked your wheel bearings?
An acid donates an H+, and a base donates an OH-.
They are experimentally determined exponents
H2S and HS-
It increases the number of high-energy collisions
Metal
A Lewis base donates electron pairs.
Dynamite exploding
Placebo
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chemical
The equation is called the rate law equation. For the reaction aA+bB =>cC+dD the rate law would be rate = k[A]^m[B]^n where k is the rate constant and m and n are the "order" with respect to each reactant. m and n must be determined experimentally and may or may not be the same as the coefficients a and b.