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Fall 2012 Final Exam Question 8

Posted: Fri Dec 02, 2016 12:29 pm
by Maddy_Larson_2J
In problem 8 from the 2012 final exam, I understand that we carry over the 4.0x10^5 mol*L^-1 because that is how many H+ atoms are generated in the first dissociation. However, because we end with the same amount of H+ ions after the second reaction, I am confused on if HCO3 generated any H+ ions?

Re: Fall 2012 Final Exam Question 8

Posted: Sat Dec 03, 2016 4:24 pm
by Shadi_Keyvani_1D
The second dissociation results in 5.6 x 10^-11 mol/L which we add to 4.0 x 10^-5 and end up with 4.0x 10^-5 mol/L because 5.6 x 10^-11 mol/L is so small in relation that makes it have no significance when the addition is done.