I need helo on question #12. I solved the problem but the percent error is a large number. Are my calculations correct?
please correct your percentage
error formula and you need to calculate the percentage error in pH
values because experimentally, you are calculating pH .
I need helo on question #12. I solved the problem but the percent error is a...
Please here is my lab questions for titration of weak acid. The
questions are very short. You have to determine the answers by just
looking at the graph based on the data points. Please give me the
answers of all of them. I would really appreciate. Please calculate
the molar mass question #7 as well. It will be of great help to
me.
Mass of the unknown acid: 0.2grams
Concentration of NaOH = 0.0500M
Formuld Bal pH of weak acid...
From the molar mass/pKa1/pKa2 values, how can I identify an
unknown polyprotic acid?
217 1. Mass of unknown acid (9) 2. Volume of NaOH at first equivalence point (ML) (from titration curve and derivative graph) 11.418 .C02055 002055 3. Moles of NaOH at first equivalence point. 4. Moles of unknown acid. 5. Molar mass of unknown acid (g/mol). 6. Experimental pka 1 7. Experimental pka 2 8. Identity of unknown acid 105 1.95 6.04 9. Theoretical molar mass of unknown...
My main question is part A however if you could assist on part B
and C as well I'd appreciate that as well
Initial data Enter the concentration of NaOH used in the titration. (M) Enter the mass of unknown acid you used in grams. (9) pH vs Volume Measurements 0.500 0.75 Table 1. pH readings PH 1.23 Initial measurement Data point 1 Data point 2 Data point 3 Data point 4 mu Data point 5 Data point 6 Data...
A thorough explanation would sure be appreciated!!!!
Thank you!!
Acid-Base Chemistry: Unknown Acid Analysis (in two experiments) Introduction In this experiment you will titrate a monoprotic weak acid with a strong ak acid with a strong base in the nd using a pH meter (Exp 2). An analysis of concentration and molar mass of the the titration data will allow you to determine the concentration and more unknown acid (Exp 1) and the ionization constant Ka (Exp 2). At the...
5. The Ka and Molar Mass of a Monoprotic Weak Acid a. Suppose that–unknown to you–the primary standard KHP (potassium hydrogen phthalate, KHC8H4O4) had a potassium iodide impurity of approximately one percent by mass. How would this have influenced the calculated molarity of your sodium hydroxide solution? Would your calculated value be too low, too high, or unchanged? Explain your answer. b. Sketch a typical titration curve for a monoprotic weak acid titrated with a strong base. Label the axes...
IF YOUR LAST NAME STARTS WITH A LETTER BETWEEN J-R, USE THIS SAMPLE DATA Sample Data - Diprotic Acid Titration Initial Data Enter the concentration of NaOH used in the titration: 0.500 Enter the mass of unknown acid you used in grams. (g) 0.75 pH vs Volume Measurements Enter all of the following data as prompted by the data point number. You have UNKNOWN B. Data Point # Volume (mL) pH Data Point # pH Volume (mL) 17.97 1 0.00...
could you show calculations please .
ncentration of NaOH used in the titration: 0.500 1 of 1 ss of unknown acid you used in grams. (g) 0.75 PIVO Vuine Measurements Enter all of the following data as prompted by the data point number. You have UNKNOWN A. 4 5 8 Data Point # Volume (mL) pH Data Point # Volume (mL) pH 0.00 1.23 19 17.97 6.40 2 0.99 1.32 20 18.97 6.53 3 2.00 1.41 21 20.02 6.67 2.97...
of Hydrofluoric acid (Ka-6.6 x 10") solution is titrated with f NaOH. Draw a titration curve, labeling the initial pH (when no sodium 40. 100 ml ofa 0.3 M olution 0.3 M solution hydroxide has been added), the pH at the mid-point of the titration, and the pH at the equivalence point (16 points).
of Hydrofluoric acid (Ka-6.6 x 10") solution is titrated with f NaOH. Draw a titration curve, labeling the initial pH (when no sodium 40. 100 ml...
Using the literature/accepted Ka value where needed,
calculate the expected pH of the titration mixture:
When 45 mL of NaOH has been added
At the equivalence point
RAW DATA AND OBSERVATIONS Table 1: Titration of acetic acid with O, DRH58 , mol L1 NaOH(aq) (5.5 marks) Concentration of acid: O 080 yeiCo mol L- Colour change: dok pak to qelloo 25.00 methyl-red b.62 mL Volume of acid sample: Indicator: Sharp or gradual change: hadud pH of color change: 3. Locate...
work check and help with the last question. pka2 is more accurate
than pka1.
58 5. Calculation of molar mass: Use class-average NaOH molarity and your part B data. (Be sure this calculation is consistent with your choice reported in #1 and 2 above.) 6. Complete the following table, having consulted a table of diprotic acids; taking into account molar mass and pKa's, identify your unknown: I Molar mass pKa1 pKa2 From titration data Data from reference | 6-1 Unknown:...