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- M 23 (H) Inorganic Analytical Chemistry pard My courses CHEM 23 (H) FS-AY:20-21 Week 4-5: Quantitative Analysis by Gravimetry and Titration Quiz 4 Qu 10 The 500.0-mg sample of impure Na2 CO3 (FM: 105.96) required 22.00 mL of the HCI standard solution (the obtained concentration of HCI from the previous question, problem 5: Titrimetry short answer type) for complete neutralization. ut of 1. Give the balanced chemical equation between the sample, Na2CO3 and the standard, HCI. 2. What is the mass (g) of Na, CO3 in the sample? 3. Calculate the % (w/w) purity of a 500.0-mg sample of impure Na2 CO3 Note: Type your solution here or upload its pic in Jpeg or pdf format. Another option is to send it to me via email (subject: Fam name-Quiz 4) or messenger, privately. Do not forget to box the final answer and write your name. В I 1.3. 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).Help me
- Procedure Preparation of Dilute Solution of Vinegar • Using a 10 mL pipette, transfer 10mL of vinegar into 100 mL volumetric flask. • Dilute to mark of the volumetric flask using distilled water. B. Titration of Diluted Solution of Vinegar • Transfer 25 mL of diluted solution to 250 mL Erlenmeyer flask. • Add 0.5 mL phenolphthalein indicator. Set aside. • Transfer 50mL of 0.110 M NaOH into a 50 mL burette. • Titrate the diluted solution until the phenolphthalein endpoint (very faint pink). • Record volume of NaOH used. Answer the question: What is the experimentally determined concentration of acetic acid in your vinegar solution: (Please give your answer to three significant figures.) ______ M Acetic AcidA 1.5000-g sample of cereals was analyzed for nitrogen using the Kjeldahl procedure. The receiving flask contained 69 mL of 0.02 M HCl. After the ammonia was collected, the solution was titrated with 0 M NaOH, requiring 11.72 mL to reach the methyl red endpoint. Calculate and percent protein in the sample (f=5.70). Ans. in 3 SFs0.2 mL of 10% sodium azide was added to 1.8 mL of 0.2% of YGM. What is the concentration of azide in this sample?
- 1. Which of the following is the well known Henderson-Halsselbalch equation?. Group of answer choices A, pH = pKa+ log ([A-]/[HA]) B, pH = pKb+ log ([A-]/[HA]) C, pOH = pKa+ log ([A-]/[HA])You have a sample of approximately 100 mg/L of calcium carbonate and the standardized EDTA has a concentration of 0.00085 M. If you only want to spend approximately 15 mL of the titrant and add 25 mL of sample in the Erlenmeyer flask, can you use it or should you dilute it? the sample?, how much? Solution: No, 29 mL would be needed to titrate the sample, you must dilute it approximately 1: 2. Taking, for example, 25 mL of sample and making up to 50 mL.Chemistry H,N. CH, H,N. HO, но Phenylalanine (1) Tyrosine (2) H,C HN CH, H,C `CH, H,C но Triethylamine (4) N-acetyl-OMe-Tyrosine (3) All four compounds are dissolved in ethyl acetate. If you started by extracting the solution with 1 M HCI, which of the following compounds would end up in the aqueous layer? 4 12 Instead, you decide to start by extracting the ethyl acetate solution with 5% NaHCO3 (sodium bicarbonate). What will remain in the organic layer? 1 2 4
- 9ー13 How mony grams og ma coz (FM JO5:95) grams og A,cO3 M JO5.94) shonld be mixed rath s.oe s.009 MAHCO, CAm 84.01) (FM to prodnu 100 mL eg buffer hith pH 10-00?REPORT SHEET Saponification and Soaps A. Saponification: Preparation of Soap Describe the appearance of the soap you prepared. A longht yelow Cyoih line)mirture upon (yoik heating B. Properties of Soaps and Detergents Tests Lab Soap Commercial Soap Detergent Bayic neutal YeS Basic Yes NO 1. pH Yes 2. Foam NO NO 3. Oil 4.1% CaCl2 コ PP+ Yes Ppt. 1% MgCl2 1% FeCl3 Questions and Problems Q1 Which of the solutions in Part B were basic? Q2 How do soaps made from vegetable oils differ from soaps made from animal fat?SOLVE STEP BY STEPDO NOT USE CHATGPTMAKE THE RESOLUTION QUICKLY PLEASE 19. What is the N of a solution of H3P04 that is prepared with 15 mL of the 90% concentrated acid and a density of 1.3667 g/mL and is volumetric to 0.5 L. (PA of H is 1.008 amu, of P is 30.9738 amu and Oxygen is 15,999 amu)