Khelil, Ali_101258560_AB pre-lab_ Lab section A6 _ group E _ TA - Micheal Land_11-29-2022 (1)

Using the data, calculate the molarity of sodium hydroxide solution for each run.

0.2061 grams of an unknown organic acid was dissolved in about 50 mL of water in a 250 mL Erlenmeyer flask and titrated against 0.1000 M NaOH solution using bromothymol blue indicator. 15.56 mL of titrant was used to achieve end point. Calculate the Neutralization Equivalent. Write answer with two decimal places only. No units please.

Titration Experiment 1: Acid-Base Titration: Unknown HCl Write chemical equation *+ HClcags N s → Naclceg) + H,O Write NIE OH c) + HEogs → H2OC) Enter the data into the table and choose three titrations to find the molarity of the unknown HCI. Unknown # HCI Titration 1 Titration 2 Titration 3 Titration 4 Titration 5 Volume NaOH used to titrate unknown HCI solution 17.43ml 16.5O ml662 mll16.57ml16.6dmL Molarity of NaOH used for each titration 0.2564 0.1787/01692/0.1704/oiado1703 Molarity of HCI Average M HCI (avg ± standard deviation) 10.1717 1.63 % Precision Calculations 1. Provide one representative calculation that you used to determine the molarity of HCI. Be sure to show all units and use proper sig figs! V HCI-25mL MHCI =? VN2OH = 16.6lmL MNAOH=0.2564 MHCI VHCI=MNAOH VAa OH MHCI 25=O. 1564 16.61 MHCI= 0.2564.16.61 25 MHCI=0.1703 2. Average molarity of three titrations. 6.1787+0.1692+0.1704+0.1619+ O.1703 MACI= 0.117

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2A student used a pipette to add 25 cm³ of sodium hydroxide of unknown concentration to a conical flask. The student carried out a titration to find out the volume of 0.1 mol/dm3 sulfuric acid needed to neutralise the sodium hydroxide. The following is the table of results obtained. Titration Volume of sulfuric acid used/cm³ 1 27.85 27.30 27.25 27.10 27.30 a. Write down a balanced equation for the reaction between sodium hydroxide and sulfuric acid. b. Describe the titration experimental procedure (details of washings are expected) c. Determine the average titre value and explain your choice of titre values in calculating the average. d. Determine the concentration of sodium hydroxide. e. If instead of sulfuric acid, hydrochloric acid of the same concentration was used what would you expect the average titre value to be and why?

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

Which of the following steps MUST be done prior to titration of an analyte? I. Prepare a standardized solution  II. Wash the burette with a standardized solution III. Fill the burette to the 50-mL mark IV. Prepare a contrast paper to determine burette volume and titration endpoint

The experimental procedure above was used to generate the data in the tables below. Data Collection Table Titration    Mass of Sample       Initial Buret Reading (mL)        Final Buret Reading (mL) 1                1.234                               1.05                                       19.95 2                1.213                                4.00                                      23.50 3                 1.273                               0.30                                    20.05 4                 1.292                             5.95                                       25.65 - For each titration, calculate: - The number of moles of potassium permanganate used in the titration (H x L of KMnO4) - The number of moles of iron present in the sample (stoichiometry in balanced equation) - The percentage by mass of iron in the solid sample (Equation 1) - The average mass % of iron in your unknown - The standard deviation in your % Fe results:

C. Titration of acid by a base Standardization of NaOH Volume of NaOH Mass of KHP Initial buret Final buret Trial used Molarity of NaOH (g) reading (mL) reading (mL) (mL) (1) (2) (3) (4) (5) 1.2075 0.7 25 24.3 0.243 (6) (7) (8) (9) (10) 1.2062 16.4 40.9 24.49 0.2412

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1. Prepare 50-mL of a 50 mM H,PO, solution in a 50-ml conical tube. Molar mass of NaH2PO4 H2O used is 138 moles 2. Check the pH of this solution and record. 3. A5 M NAOH solution has been provided. 4. Add 45 µl of 5 M NaOH into the 50 mM H2PO, solution. Check the pH and record. 5. Add 205 µl of 5M NaOH into the 50 mM H2PO4 solution. Check the pH and record. 6. Add 205 µL more of 5M NaOH into the 50 mM H2PO, solution. Check the pH and record. 7. Add 45 µl of 5 M NaOH into the 50 mM H2PO, solution. Check the pH and record. Complete the following table "predicted pH." Please show all work on a separate sheet of paper and attach. Note that the pK, of H2PO, is 7.2. What would be the predicted pH's? Would they be similar to the actual pH's from procedure? After 45 µl of 5 | After 205 µl more of 5M NaOH Original After 205 µl more After 45 µl more solution M NaOH of 5M NaOH of 5 M NaOH Actual pH 4.30 6.05 6.90 11.01 11.29 Predicted pH

Table 1. Titration data   Trial 1 Trial 2 Trial 3 Initial burette reading (mL) 1.48   1.89   1.95   Molarity of NaOH (M) 0.100   0.100   0.100   Volume of vinegar sample (mL) 5.00   5.00   5.00   Final burette reading (mL) 49.32   49.06   49.93   Table 2. Titration data Table view     List view Table 2. Titration data   Trial 1 Trial 2 Trial 3 Initial burette reading (mL) 1.48   1.89   1.95   Molarity of NaOH (M) 0.100   0.100   0.100   Volume of vinegar sample (mL) 5.00   5.00   5.00   Final burette reading (mL) 49.32   49.06   49.93   Expected color at end point Choose...     Choose...     Choose...     Volume of NaOH used (mL)             1. Average Volume of NaOH used in liters 2. Average moles of NaOH used (mol)   3. Average moles of acetic acid (mol)   4. Average molarity of acetic acid (M)   5. Average mass of acetic acid (g)…

3. Titration: Strong Acid / Weak Base. (I warned you to be ready!) Here's the cool chart! Analyte: 20.00 mL 0.100 M Hydrazine (N₂H4) Hd A: initial Vertical (Value) Axis Title 0 B: half equivalence C: equivalence 5 10 15 20 Titrant: mL of 0.100 M HCI added 25 20.00 mL of 0.100 M hydrazine (N₂H4, pKb = 5.77) is titrated with 0.100 M HCl. a) Find the initial pH (point A) and the pH at the equivalence point (point C). b) Find the pH at the half equivalence point (point B).

Hi I am having trouble finishing and finding the rest of the data for my Titration lab. I've already imputed the given data and just need to find the rest of the excel boxes using those data, thank you.

The following titration data was collected by a students in CH1031. Based on the results, determine the concentration of the aqueous hydrochloric acid. Concentration of NaOH used: 0.25 M Volume of NaOH used: 25.0 mL phenolphthalein Colorless to pale pink Indicator: Endpoint color change: Table 1 Volume of hydrochloric acid Required Burette reading (mL) Trial 1 29.28 1.78 Trial 2 Trial3 36.62 43.98 16.62 Final reading Initial reading Volume HCl used (mL) 9.28

light data and DID NOT round any intermediate calculations. In a 3.8M aqueous solution of benzoic acid (C6H, CO₂H), what is the percentage of benzoic acid that is dissociated? You can find some data that is useful for solving this problem in the ALEKS Data resource. Round your answer to 2 significant digits. 7.0 % GEE ola

Could someone please explain how to answer this question and show work for the calculations to determine pH using the chart provided? Thank you.

Please do the values of 160mL to 260mL, I have already done 0-130mL. I am also having trouble creating the titration chart. Thank you!