4. What is the effect on the experimental result when each of the following happens?
(1) Adding (NH4)2S205 first instead of KI.
(2) Add (NH4)2S208 solution slowly.
(3) Too much or too little of Na2S2O3 was used.
5. For the reaction S2082- + 3 F = 2SO42- + 13, if F or 13′, instead of S2082. , is used to represent the normalized rate of the reaction, will the rate constant be the same?