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How to Draw log C-pH Diagrams on Graph Paper 1. The y axis is log C and it can have different scales, 0 to -8 or -2 to -9. 2. pH is on the x axis → 0 to 14 3. Plot H+ line → it will pass through 0,0 and 7,7 (and will have a slope of –1) 4. Plot OH- line → it will pass through14,0 and 7,7 (and will have a slope of +1) 5.
From Eq. (4), it is easy to see that since log 1 = 0, the maximum buffering capacity is when pH=pKa. For the titration of a weak monoprotic acid, this occurs at the half-way point of the titration when the number of moles of added base is exactly one-half the number of moles of weak acid originally present.
So I found this equation on chegg, used for calculating C, Concentration of solution after acid is dissolved). Does this only work for weak acid? Why does it work?(Is it a derivation from Henderson Hasselbach equation, pH=pKa+log([A-]/[HA]?) Any input is appreciated, thank you!
18 Ιουλ 2024 · Click on the Excel file link to download a spreadsheet for triprotic acid titrations that has sliders to interactively change pKa values, as shown in the image below.
pH vs. pK a Since pH = - log [H+] = log € 1 [H+], note: [H+] = [H 3 O +] K a = € [A−][H 3 O+] [AH] can be transformed into pK a = log € [AH] [A−] + pH Note: The pH of a solution can be adjusted by adding an acid or base. For example, Acetic acid [CH 3 C(=O)OH] has a pK a of 4.76 At pH = 4.76, 4.76 = log € At pH = 8.76, 4.76 = log
pKa = -log Ka. The larger the pKa, the weaker the acid. pKa is a constant for each conjugate acid and its conjugate base pair. Most biological compounds are weak acids or weak bases. Some acids are polyprotic acids; they can lose more than one proton. In this case, the conjugate base is also a weak acid.
29 Σεπ 2021 · Revision notes on 5.5.2 pH, Ka, pKa & Kw Calculations for the CIE A Level Chemistry syllabus, written by the Chemistry experts at Save My Exams.
