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Airin
Questions (6)
How would you solve these problems? I am confused about what it is asking and how to start it. A step by step process with
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How would you exactly start the first problem? My thermodynamic skills is a bit rusty. I am assuming I have to use ΔH°f under
5 answers
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How would you start these problems?
...I suppose this is a continuation from this post: (replace the numbers with id=1395127807)
0 answers
1,121 views
Determination of Ksp, ΔG°, ΔH° and ΔS° for Ca(OH)2.
*** Need help on problem #3 & #4 *** CALCULATIONS: 1. Calculate the
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1,628 views
How would you calculate the pH of the buffer if 1.0mL of 5.0M NaOH is added to 20.0mL of this buffer?
Can someone please explain
1 answer
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How would you calculate the pH of the buffer if 1.0mL of 5.0M NaOH is added to 20.0mL of this buffer?
Can someone please explain
4 answers
1,357 views
Answers (7)
Or calculate dHo and dSo at standard enthalpies of formation and entropies?
Thank you DrBob22. :) But for #1, am I looking for dGo for H2(g)?
I found out that Molarity of HCl was 0.5 M. So then, 0.5 M HCl = 0.9018 mol HCl/ L HCl L HCl = (0.9018 mol/0.5 M) HCl = 1.8036 L x 1000 mL/1 L) = 1803.6 mL = 1800 mL HCl
For part C, I just wanted to make sure if I did the calculations correctly when taking the anti-log. 7.07 = 7.21 + log (0.7256-x)/(0.1+x) -0.14 = log (0.7256-x)/(0.1+x) 10^-0.14 = (0.7256-x)/(0.1+x) (10^-0.14)(0.1+x) = (0.7256-x) x = 0.9018 mol HCl M of
Oh right, the parent acid was H3PO4. In part A, when calculating the pH, what exactly is pKa2? I am still unsure how to find the Ka/Kb on the tables of Ka's and Kb's. In part B, you mentioned that in 20 mL I will have 0.145 mol base and 0.02 mol acid. The
Would it be pOH = 14 - pH Then, [OH-] = 10^-pOH After finding [OH-] find the mol ratio?
How do you find the concentration of[OH-]? :C
