You are experimenting on the effect of temperature on the rate of reaction between hydrochloric acid (hcl) and potassium iodide (ki). when the reaction is completed at 400k there are approximately 250,000 collisions per mole of reactant. you run the experiment again at 150k. which of the following would you expect to be the number of collisions recorded at 150k a. 0 b. 400,000 c. 250,000 d. 15,000

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.