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Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: Sazzerah on June 19, 2013, 01:26:14 PM

Title: Rate Constant
Post by: Sazzerah on June 19, 2013, 01:26:14 PM

I cannot figure out the question I am given, I have done the ones before it but they didn't have 10^-6;
"The reaction between NO and Cl₂ has been studied at 50°C, recording the initial rate of formation of NOCl for the initial cconcentrations of reactants as shown in the table.

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fi1085.photobucket.com%2Falbums%2Fj432%2FLazmarr%2FTable.jpg&hash=988b490557bfb5ce463eb886de28cd55b2da7dbf)

Write the rate equation for the above reaction and work out the value for the rate constant."

I would appreciate it if I could get some help with this as I need to complete this by this Friday.

Title: Re: Rate Constant
Post by: Borek on June 19, 2013, 04:12:06 PM

Could you solve it if rates were 1.43, 2.86 and 11.4?

Title: Re: Rate Constant
Post by: Sazzerah on June 19, 2013, 04:38:54 PM

Quote from: Borek on June 19, 2013, 04:12:06 PM

Could you solve it if rates were 1.43, 2.86 and 11.4?

I get this, but if I am wrong please correct me and could you tell me the units for the answer please;

1.43*10^-6 / (0.25^2*0.25^1) = 0.00009152 (I think it is first order)
2.86*10^-6 / (0.25^2*0.50^1) = 0.00009152 (I think this is first order)
11.4*10^-6 / (0.50^2*0.50^1) = 0.00009120 (I think this one is second order)