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roselin
 2 years 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
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.1they want the activity coefficients for the different ions considering the ionic strength given

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

aaronq
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.0we have to calculate and plot it

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

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

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

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

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

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

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

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