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roselin
 one year ago
what does the following mean? Calculate single ion activity coefficients for Cs^+, Cd^2+,Al^3+ and dissolved H2CO3 as a function of ionic strength for 10^4 lessthan equal I lessthan equal to1?
roselin
 one year ago
what does the following mean? Calculate single ion activity coefficients for Cs^+, Cd^2+,Al^3+ and dissolved H2CO3 as a function of ionic strength for 10^4 lessthan equal I lessthan equal to1?

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aaronq
 one year ago
Best ResponseYou've already chosen the best response.1they want the activity coefficients for the different ions considering the ionic strength given

roselin
 one year ago
Best ResponseYou've already chosen the best response.0i am using the davies equation to calculate it, so each time I have to change the ionic strength th?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1hm no that doesn't seem right. i don't know what they mean by \(10^{4} \leq 1\), it doesn't make sense.

roselin
 one year ago
Best ResponseYou've already chosen the best response.0its \[10^{4}\le I \le1\]

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1oh, i thought you typed the same thing twice accidentally. I guess they want it within that range? thats a large range though. I would graph it

roselin
 one year ago
Best ResponseYou've already chosen the best response.0we have to calculate and plot it

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1i guess do a few points for each ion and then plot it

roselin
 one year ago
Best ResponseYou've already chosen the best response.0can I show you the full question ? please tell me what I should do

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1plug it into the formula? \(log\;\gamma=0.5Z^+_0Z^_0.. etc\) it's kinda weird though because they don't give you the negative counter ion

roselin
 one year ago
Best ResponseYou've already chosen the best response.0if I were to do this manually using that given range, how would I approach it?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1you would calculate the coefficient for several points (ionic strengths) do 3 or 4, then plot these. Activity coefficient on the y axis and ionic strength on the x axis (although you can do on which every way you want)

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1it's much easier if you do it in excel though

roselin
 one year ago
Best ResponseYou've already chosen the best response.0yes, that is where I am having problem.

roselin
 one year ago
Best ResponseYou've already chosen the best response.0like that range is between 10^4 to 1 right?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1yep thats the range of "I" they gave

roselin
 one year ago
Best ResponseYou've already chosen the best response.0how would I calculte that in excel though?

roselin
 one year ago
Best ResponseYou've already chosen the best response.0if I do it manually then can I chose to do something like I= 10^4,10^3, 10^2 and 10^1?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1for excel you need the x data point and the y data point the x you can just make up: 10^4, 10^3 then for the y you have to use the result from the equation, so you would type up the equation and use the x data points, then fill it. If you're not familiar with excel trying it this way might take you awhile

roselin
 one year ago
Best ResponseYou've already chosen the best response.0okay, thank you so much.
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