State the order with respect to each reactant and overall order for the following reaction :
`H_2O_2+3I^(-)+2H^(+)rarr2H_2O+I_3^(-)(aq)`
Rate=`K[H_2 O_2][I^(-)]`
What are the units of rate constant?

Explanation

`H_2O_2 + 3I^(-1) + 2H^(+) to 2H_2O + I_(3)^(-)`
Order w.r.t. `H_2O_2 = 1`
Order w.r.t `I^(-1) = 1`
Order w.t.t` H^(+) = 0`
Overall order = `1 + 1 + 0 = 2 `
Units of rate constant = `L mol^(-1) s^(-1)`