Parameter Value 1. Benzoic acid sample weight, g 0.1702 2. Water volume used, mL 10.0 3. Methylene chloride volume used, mL 5.0 4. Number of extractions 3 5. Erlenmeyer flask weight, g 93.6201 6. Erlenmeyer flask + recovered sample weight, g 93.7841
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From the following data (given table in picture 1), solve using this equation (picture 2)
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- Trial I Trial II Final reading HCI 26. 40 ml 27.10 ml Initial reading HCI 1.2 ml 1.8 ml Volume of HCl used ? ? Final reading NaOH 33.7 ml 32.8 ml Initial reading NaOH 0.8 mL 0.5 ml Volume of NaOH used ? ? For trial I: Normality of NaOH : 0.25 N Vol. of HCl used = final volume - initial volume Solve for the average Normality of HCI : ? NHCI x VHCI = NNAOH x VNAOH Vol. of NaOH used = final volume - initial volume NNAOH x VNAOH For trial II: NHCI = Vol. of HCl used = final volume - initial volume VHCI Activa Vol. of NaOH used = final volume - initial volume Go to STable 1: Standardization Data Trial 1 Trial 2 O145504 Mass of KHP 04536 Initial burette reading 0.05ML 12.3 ML Final burette reading 12.8 a6.omL Volume of base used ר.12 13.2 mL Data Analysis: KH Cg Hg Da (MOIAR MASS 2041ag) 1. Calculate the molarity of base for each trial. You must use dimensional analysis – show all unit conversions (hint: start with grams of KHP used). Review the balanced equation for KHP and NaOH you wrote in Expt 11 part 1. (204.29 TRIAI 1: 0.4550g. Average: Trial 2: Trial 1: with 1875 mL of your base (use the averageData Collection Mass of the original sample of mixture (g) 1.547 Mass of recovered naphthalene (g) 0.511 Mass of recovered 3-nitroaniline (g) 0.480 Mass of recovered benzoic acid (g) 0.472 % by mass of naphthalene in original sample % by mass of 3-nitroaniline in original sample % by mass of benzoic acid in original sample Total percent recovered 1. You find a separatory funnel set up in a fume hood. There are clearly two visible layers. Describe a method you could use to determine which layer is the aqueous layer. Normal BIIIU X2| X² | → EE = fx | ®I D 2. If you had a mixture of butyric acid and hexane, how would you separate the two compounds? Normal BII|U X2 | X² | → fx |
- Data Collection Mass of the original sample of mixture (g) 1.547 Mass of recovered naphthalene (g) 0.511 Mass of recovered 3-nitroaniline (g) 0.480 Mass of recovered benzoic acid (g) 0.472 % by mass of naphthalene in original sample % by mass of 3-nitroaniline in original sample % by mass of benzoic acid in original sample Total percent recovered You find a separatory funnel set up in a fume hood. There are clearly two visible layers. Describe a method you could use to determine which layer is the aqueous layer. Normal BIIIU X2| X² | → EE E fx | ® If you had a mixture of butyric acid and hexane, how would you separate the two compounds? Normal BII|U X2 | X² | → fx |Doard.learn.xythos.prod/579872cf81db6/2987817?X-Blackboard-53-Bucket-blackboard.learn.xythos.prod&X-Blackboard-Expiration= S 1/2 CHEM1407 HF HBr #1) Identify if the following substances are a weak acid, strong acid or neither and write the dissociation equation for the acids LiOH H₂SO3 NH3 HC₂H302 HCIO4 HCIO HF H₂SO4 #2) Identify the following as a monoprotic, diprotic, or triprotic acids H3PO4 HC1O2 HNO3 100% + H₂C₂O4 Homework Ch 16, Sec 6A H Name: 63°F Mostly cloudySix measurements are obtained for the mass of water delivered by a calibrated volumetric pipet: 4.518 g, 4.521 g. 4.520 g. 4.526 g, 4.518 g, and 4.521 g. Use a spreadsheet to determine the mean and 95% confidence interval of these measurements. mean: 95% confidence interval: %23
- - Chapte x 6 Questio x G "How m X O Chem C x E R.12 ML x A Frequen x E Advanc x * Google x E R.12 ezto.mheducation.com/ext/map/index.html? con=con&external browser%3D0&launchUrl=https%253A%252F%252Flms.mheducation.com%252 Saved apter 4 Assignment 13 3 attempts left Check my work Enter your answer in the provided box. How many grams of KOH are present in 30.0 mL of a 7.39 M KOH solution? ts g eBook Print ferences3.007 g nutmeg powder 15 ml diethyl ether used as solvent 0.1865 g purified trimyristin a) Determine the % trimyristin recovered. b) Based on your calculations, what percentage of the mass of the nutmeg powder was trimyristin? How accurate do you think this value is? Explain your answer. c) Do you think this value would change for either a different brand of nutmeg or a different extraction solvent?NO2 H2 (excess) cat. Pd/C
- Data Sheet Extraction ODD EVEN ODD EVEN GROUP Single Extraction 1 Single Extraction 2 Multiple Extraction 1 Multiple Extraction 2 Weight of tea leaves 10.002 (g) 10.123 (g) 10.013 (g) 10.007 (g) Weight of evaporating dish + caffeine 123.689 (g) 124.334 (g) 121.815 (g) 126.523 (g) Weight of empty evaporating dish 123.513 (g) 124.147 (g) 121.614 (g) 126.246 (g) Weight of caffeine Identify the two layers in the procedure. In which part does caffeine can be extracted?2. Estimate the absolute deviation and the coefficient of variation for the results of the following calculations. Round each result so that it contains only significant digits. The numbers in parentheses are absolute standard deviations. 2 (1.203 (+0.004) x 103 + 18.25 (10.005) x 102 – 34.012(±0.001)) 3.9201 (+0.0006) x 10-3 y =Answer questions 1 and 2 according to the data given. Dater Weight of cream i: 326 kỳ. Table shows some data obtained directly from Lactascan instrument. Fat % SNF % Lacto- density 27.32 30.23 Raw milk 4.15 7.97 Skim milk 0.08 8.26 Q1. Calculate fat percent of creamn A) 46 B) 28 (C) 3D D) 0.046 آدرما 396 100 x Q2. Calculate efficiency of the cream separator. A) 100% B98% C) 97% D) 96% E) 87.2% amount 2500 L E) 0.28