Use this data to answer the following questions.

Question

A chemistry graduate student is studying the rate of this reaction:

2HI (g) -> H₂ (g) + I₂ (g)

She fills a reaction vessel with HI and measures its concentration as the reaction proceeds:

Time (minutes)	[HI]
0	0.0700M
1.0	0.0254M
2.0	0.0155M
3.0	0.0112M
4.0	0.00873M

Use the data to answer the following

rate law for this reaction. Rate = k

calculate value of the rate constant k. k =

round to 2 significant figures and use the correct unit symbol

Answer 1

Plot [HI] vs time

If a plot of [A] vs t gives a straight line, it is zero order

If a plot of ln[A] vs t gives a straight line, it is first order

If a plot lf 1/[A] vs t gives a straight line, it is second order

Once you have determined the ORDER, then use the integrated rate law for that order and solve for k