3) You mix together in the proper manner the following VOLUMES: 0.0100 M Potassi

Question

3) You mix together in the proper manner the following VOLUMES:
0.0100 M Potassium iodide...14.7 mL
0.0010 M Sodium thiosulfate...5.6 mL
Distilled water...22.7 mL
0.0400 M Potassium Bromate...11.7 mL
0.100 M Hydrochloric acid...5.6 mL
Using the rate constant and rate equation from problem 2),

exponent c is 1.92
exponent constant K 4.7125

CALCULATE the time to turn blue...__________________ sec (c)

4) A plot of log Rate vs 1/T gives a best straight line which goes through....
1/T = 0.00300, log rate = -4.46
and 1/T = 0.00352, log rate = -6.00.
CALCULATE:
The Slope of the line..._____________ (d)
The Activation Energy (Ea) (Kj/mol)...________________(e)

thanks in advance

Explanation / Answer

Question 2 , 3 data is not given from some previous data.

4. For the given graph ( which is Arrehenius plot)

Slope =lnK2- lnK1 / 1/T2 - 1/T1 = (-6) - ( -4.46) / (0.00352 - 0.003) = -1.54 / 0.00052= -2961.53

Now , Slope = = -Ea / R

Ea = activation energy

R = gas constant = 8.314

Ea = 2961.53 X 8.314 =24622.16 J / mole = 24.622 KJ / mole

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