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3 Rates of Chemical Reactions I: A Clock Reaction A. Preliminary Experiments 1. What are the colors of the solutions containing the following ions? K 2. The color of the starch-I, complex is blue-black colorless or color less 3 B. Kinetics Experiment Solution 1. Initial (S. OS 1-0.050 M; initial [l =0.050 M. Time experiment started Time (s) benveen Total moles of Aliquor no appearances of color Cumulative times (8) $0, consumed 1 188 2.0x to 2 190 338 4.0x16 200 578 6.0x104 4 215 793 80x100+ 235 1023 10.10- 255 12.83 12x10 7 284. 1557 14*10-4 Solution 2. Initial _02-1=0.10 M. Inicial [r]=0.050 m. Time experiment started 2 Time (8) between Total moles of Aliquor no. appearances of color Cumulative rimtes is) So, consumed 1 9 91 2010- 2 95 186 4,0 10+ 97 283 60X10- 382 8.0x10 482 10. 10- 100 582 12x 10- 102 684 Solution 3. Initial (5.0, 1-0.050 Bf, initial TO $ 0,2-consumed Cumulative times (8) 24% 2.0x10-4 4.0x10 6.0x10- 8.0x10-4 10.x 10- 12x10+ 14x104 523 680 True (s) beheer Aliquor no appearances of color 1 2 126 3 384 136 143 153 160 840 170 1010 Solution 4. Initiat S 0,2-)-0,10 M; initial [1] =0,025 M. Time experiment started Total moles of Time (s) between Aliquot no. appearances of color Cumulative tintes (5) 1 192 192 2 198 390 3 203 593 6.0x10 209 802 8,0x10-4 5 209 jon 6 218 1229 7 221 1450 14*10-4 5,0,?- consumed 2.0x10-4 4.0x10- + 10.x10- 12x10+

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Stewart

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Step 1/4

There are 4 solutions given for which we have to calculate k.

For solution 1, we need to find rate= `{1}/{2}{[S_{2}O_8]}/{t}`

Explanation:

rate = k [S 2 O 8 2- ] x [I - ] y

Step 2/4

Putting the values of [S 2 O 8 2- ]= 2 ` x` `10^{-4}` for aliquot no.1 For no. 1: rate= `{1}/{2}{2 xx 10^-4}/{188}=5.138 xx 10^-7 mol //sec`For no. 2: rate= `{1}/{2}{4 xx 10^-4}/{378}=5.29 xx 10^-7 mol //sec`For no. 3; rate= `{1}/{2}{6 xx 10^-4}/{578}=5.19 xx 10^-7 mol //sec`For no. 4: rate= `{1}/{2}{8 xx 10^-4}/{793}=5.04 xx 10^-7 mol //sec`For no. 5: rate= `{1}/{2}{10 xx 10^-4}/{1023}=4.88 xx 10^-7 mol //sec`For no. 6: rate= `{1}/{2}{12 xx 10^-4}/{1283}=4.67 xx 10^-7 mol //sec`For no. 7: rate= `{1}/{2}{14 xx 10^-4}/{1557}=4.49 xx 10^-7 mol //sec`

Explanation:

Putting the values of cumulative time and number of moles of [S 2 O 8 2- ] for each aliquot number.

Step 3/4

We have seven different readings for the experiment so we need to calculate the mean.

the mean rate= `4.98 xx 10^-7 mol//sec` .

Explanation:

We have seven different readings for the experiment so we need to calculate the mean. To calculate the mean rate = `{rate 1+rate 2+rate 3+rate 4+rate 5+rate 6 +rate 7}/{7}` = `4.98 xx 10^-7 mol//sec`

Step 4/4

[S 2 O 8 2- ]=0.050

[I -1 ]=0.050

k= `{rate}/{[S2O8 2- ][I-1]}`

For solution 1

k= `{4.98 xx 10^-7}/{{0.050}{0.050}}=1.993 xx 10^-4 mol^{-1} sec^{-1}litre`

Explanation:

The formula of rate= k[S 2 O 8 2- ][I -1 ]

Final Answer

k 1 = 1.993 ` xx 10^-4`

Similarly we will calculate k for all 4 solutions and find the mean k.

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A calica cat is a multicolored domestic cat whose fur that is orange, white, black, cream, and gray. My adorable callco Kitten Cate the Great, is shown below. It turns out that nearly all calico cats are female. One source daims that exactly 99.9% of all call cats are female. We are interested in testing this claim. Let p be the true proportion of all calico cats that are female. A sample of 104 randomly selected callco cats found that 100 were female. Round all answers in this problem to three decimal places. (a) (4 points) What are the appropriate null and alternative hypotheses? (a) (4 points) What are the appropriate null and alternative hypotheses? hypothesis OHD O HD999 O H D >0.900 Alternative hypothesis: OHP - 0.999 O HD99.9 OH 0.999 OMD99.9 OHID0.999 (b) (2 points) What kind of hypothesis test is described? TWO-tailed test Left-tailed test Right-tailed test One-tailed test (c) (2 points) What is the sample proportion of female calice cats in the study (d) (4 points) What is the appropriate test statistic for the hypothesis testin (b)? 0.05, what is the appropriate conclusion? (a) (2 points) at Foto Palto reject Red Refect (4 points) using the sample data, computer an upper bound for a lower 99% confidence interval for p. This upper bound is (a) (2 points) Based on the confidence interval in (). Is 99.9% a plausible value for the true percentage of calice cats that are female? 99 is plausible O s implausible (Bonus) What one word best describe my click the pictured The best n e wer from each section will receive one bonuspoint.