[kimj1023]

hi! im having problem with these kind of problems,
dont know how to solve it, can someone help me?

Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]^2
By what factor does the rate change if the concentration of H+ is halved? Just put in the number as a whole number or fraction.

[enahs]

Is it first or second reaction order? What does it means for whichever reaction order it is? This is probably in your book, either in bold or in a table/chart, or some colored section..