hOW i CALCULATE PERCENT ERROR FOR BOTH pka1 AND pka2.....Answer post lab questio

Question

hOW i CALCULATE PERCENT ERROR FOR BOTH pka1 AND pka2.....Answer post lab questions

Data Tables Part 1: Working with pH indicators Parameter Initial buret reading Final buret reading Volume of NaOH delivered Total number of drops delivered Malachite Green Methyl Orange Phenolphthalein 231 me 237 m lob Color at start of titration clear 10% 531dde-DDodge Color change at 1t equivalence point (if no change, write "none" Pin A ight ColortesS none none Drops delivered at li equivalence 230 does aa8 do aa7dops point Drops delivered at 1st ½ equivalence point pH at Equivalence Point (e pKa) PH Average 1" pKa Color change at 2 equivencerone Color change at 2"0 equivalenceo Lighter point if no change, write "none") Drops delivered at 2nd equivalence point Drops delivered at 2nd ½ Hellow Pin | oes | y lo d (ORS "Koa does pH at 2eqivalence point (e pKa) Average 2d pKa pti

Explanation / Answer

For pst lab questions, I need more explanation of what you do, and more data of the indicators, because right now I don't remember the function of each indicator. Try to analize all the data you have, and the practice lab. It's not that difficult to solve

Now the percentage of error of pka1 and pka2 it's easy:

for pka1:

%pka1 = (2.68 - 2.26 / 2.26) x 100 = 18.58%

%pka2 = (6.89 - 6.77 / 6.77) x 100 = 1.77%

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