In this study of the reaction between the iodide ion and persulfate ion: S20;2 + 21 → I2 + 2SO,² we have chosen to express the rate as the change in the concentration of persulfate ion, S2Og², per unit time. Since persulfate ion is being consumed in the reaction, the concentration is decreasing and the rate of change is negative. As an equation we can write: Rate = -AS2O§² /At If we were to instead express the rate as the change in concentration of iodine, I2. per unit time, which of the following statements would be true (Select all that apply) the concentration of iodine is increasing the rate would be positive the rate would be negative O the rate could be expressed as Al2/At the concentration of iodine is decreasing none of these statements are correct, the rate cannot be expressed this way O O O O O O

The following initial rate data are for the reaction for the formation of phosgene from carbon monoxide and chlorine: со + Clz → COCI2 Initial Rate, Ms-1 Experiment [CO]o, M [CIz]o, M 2.45 0.399 1.43x10-28 2 2.45 0.798 |2.85х10-28 3 4.90 0.399 2.85x10-28 4 4.90 0.798 5.71x10-28 Complete the rate law for this reaction in the box below. Use the form k[A]m[B]^ , where '1' is understood for m or n and concentrations taken to the zero power do not appear. Don't enter 1 for m or n Rate = From these data, the rate constant is M-1s-1.

In the presence  of excess thiocyanate ion, SCN-, the following reaction is first order in iron(III) ion, Fe3+; the rate constant is 1.27/s. Fe3+(aq) + SCN-(aq)  → Fe(SCN)2+(aq). How many seconds would be required for the initial concentration of Fe3+ to decrease to 12.5% of its initial value?  Express your answer to two decijal positions.

Under certain conditions the rate of this reaction is zero order in hydrogen iodide with a rate constant of 0.0041 M's : 2 HI(g) → H2(g)+I,(g) Suppose a 4.0 L flask is charged under these conditions with 300. mmol of hydrogen iodide. After how much time is there only 150. mmol left? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. x10