Table I: Calibration of dropper: UMCO2/drop Trial # of drops Average ml/drop (ml/drop x 10UMCO/ml) 32 drops 34 drops 3 33 drops *UMCO2 can be computed by multiplying ml/ drop X 10 UMCO2/ml = UMCO2/drop
Q: The scatter of replicate measurements may be expressed by: Accuracy 2. O Standard deviation 1. 3. O…
A: When we obtain data which is highly scattered, the analytical tool we can use standard deviation.
Q: Determine the molar concentration of food dye in the sample
A: We are given absorbance of analyzed sample to be 0.349 we have to find molar concentration
Q: Ture or False The coefficent of vriance is the half of standard deviation
A: The coefficent of variance is the half of standard deviation.
Q: Jse only dimensional analysis to solve this problem. Include a number, unit, and substance in the…
A: Given that: Mass of methanol = 60.0 g Density of methanol = 0.791 g/mL Percent of solution =…
Q: A. Standardization of Sodium Hydroxide (NaOH) Solution 3 Trial 1 126.2 125.7 512 264mL Trial 2 Trial…
A: #B: analysis of an unknown acid: We have to use the molarity of the standardized NaOH obtained in…
Q: Calculate the concentration of Pd<t ion in an unknown sample based on the following data: Vol. of…
A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…
Q: The solubility of an unknown liquid was measured 4 times. The average solubility is 0.05897 mL/mL…
A: The quantities which come across during the scientific studies are named as physical quantities. The…
Q: A ALEKS - Esther Octave - Learn x M Please join Zoom meeting in pr X Post Atteñdee i…
A:
Q: Determine the percentage error and the concentration of the prepared NaOH given the following data.…
A: Answer: This is the question based on acid-base titration where with the of KHP data we have to find…
Q: acia SOluti Select one: -5 а. 1.33 х 10 М -4 b. 3.76 x 10 'M -5 C. 2.66 x 10 M -5 M d. 5.32 x 10
A: Answer - The correct option is (d) 5.32*10^-5
Q: Arrange the values according to magnitude. Greatest Least Answer Bank 7.6 x 10-6 3.3 x 10-2 9.0 x…
A: The value which is more than zero ( > 0 ) has the greatest magnitude and the Value which is less…
Q: The required volume of 28.0 (w/w) % ammonium hydroxide (density =0.899g/mL) diluted it up to 500.0…
A: We know that V1×S1 = V2×S2 V1 = volume of concentrated solution S1 = concentration of stock solution…
Q: 1000 mL of 0.45% NaCl IV for 6.5 hours Drop factor: 60 gtt/mL Flow rate: ________ gtt/min
A: IV flow rate An IV flow rate is a way of describing the rate of an intravenous infusion based on the…
Q: Answer the following questions. _____1. Which of the ff you can use for mixing liquids? a) test tube…
A: 1) The tool which is used for mixing liquids is stirring rod. Therefore, the correct answer is…
Q: In a gravimetric chloride analysis, it was found that 0.82g AgCl was obtained from an unknown that…
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…
Q: standard deviation
A: If there is two results having standard deviation Sa and Sb. Therefore standard deviation indicate…
Q: Ordered: 1000 mL of 0.45% NaCl IV for 3 hours. Drop factor: 20 gtt/mL. Flow rate: ________ gtt/min
A: A question based on dimensional analysis that is to be accomplished.
Q: NSCI- Chemistry Answer only 10-12
A: Units of measurement are necessary to measure the quantities. There are instances when the measuring…
Q: Student JB filled the10 mL -volumetric flask with distilled water. Afterwards he transferred the…
A: The solution is given below -
Q: (a) (Apply fractions as (b) (Use the lowest pos (c) (Apply fractions as r
A: According to the question, we need to write the balanced formation equation at standard conditions…
Q: In a gravimetric chloride analysis, it was found that 0.82g AgCl and 0.80g AgCl was obtained from an…
A: Moles = mass / molecular mass molecular mass of AgCl = 108 + 35.5 = 143.5 => moles of AgCl in…
Q: The primary standard substance must be less equivalent weight (or molecular Wt. ) False True
A: Primary standard substance are used to standardized the secondary materials or solutions which is…
Q: II. lodometry II. Permanganate IV. Dichromate
A: Indicators can be defined as the substances that change colour when they are added to basic or…
Q: volumertic and non-volumetric quantitative analytical menthods
A: Volumertic and non-volumetric quantitative analytical methods.
Q: Observations: Burette Reading (ml) Normality of a520 solution (N) Volume of NaSy02 soution (m)…
A: The amount of oxygen present in one liter of water in a dissolved state is called dissolved oxygen.…
Q: 1. Make sure you know how to obtain the highlighted results from the given information. Molar…
A: Hi, Since you have asked multiple questions (two tables), we will solve the first question for you.…
Q: tudent needs 25.0 mL of 9.60x10 e No. 6 stock solution to work with, how much of the 2.00 mM…
A: Formula used M1V1 = M2V2 where M= Molarity and V= volume
Q: Your NaOH concentration 0.10 Trial 1 Trial 2 Volume of Acid (in mL) 12 ml 14 ml Initial Buret…
A: Disclaimer : To find out the percentage error , actual concentration of the acid should be known.…
Q: 1. Standardization of Sodium Hydroxide Primary Standard used: Formula Mass of Primary Standard: %…
A: In the given question we have to do the standardization of NaOH and to calculate the required NaOH…
Q: 2. Express 8 ppm in ratio strength and percentage strength. Truncate to four decimal places. 2a.…
A: ppm :- ppm (m/v) is defined as Amount of solute in gram present in 1000000 mL of solution. %…
Q: A lab pair’s Beer’s Law calibration graph 0.08 < A < 0.79 had a best-fit line of A = 0.013 C –…
A:
Q: Peak area proportional to mass or concentration of the individual components of the sample injected.…
A:
Q: Value Number of sig figs 301.50 0.0500 2650 7.560 x 1023
A: To determine the number of significant digits .
Q: Rxn: A + B -> C + D [A] M [B] M Rate M/s TRIAL 1 0.21 0.70 6.3 x 10^-3 TRIAL 2 0.63 0.65 1.89 x…
A: The rate of reaction equation for the given equation is:…
Q: 2. Which of the following data sets is more precise? Which is more accurate? How do you kr Data Set…
A: Error is determined by the difference between the measured value and true value.
Q: Construct a calibration curve: (a) Subtract the blank value (9.1) from all other values (this means…
A: (a) Slope = 874.05 ± 10.62 Intercept = - 29.61 ± 9.65 Calculation table vol %…
Q: 3. Two laboratory staff titrated a 50.00 mL of hydrochloric acid with an unknown concentration with…
A: Smaller the standard deviation of a data set, more precise is the measurement. A more accurate…
Q: Volume Measurements (procedure) The small white cup is filled to the lid with water. The volume of…
A:
Q: A method for the determination of the corticosteroid methylprednisolone acetate in solutions…
A: Given: mean value = 3.7 mg mL-1 standard deviation s = 0.3 mg mL-1 formula to find samples n = Zα2…
Q: 1. A calibration weight with a known mass of 25.000 g was weighed on two different balances with the…
A: Mean = sum of all values divided by number of values. Percentage error = (|actual value - expected…
Q: A pharmacist is asked to weigh 140 mg of lidocaine powder on the standard balance. The maximum…
A: Given that, Sensitivity requirement = 3mg Acceptable error = 5% To be calculated, Minimum weighable…
Q: Seconds (s) Tap H2O Temp (°C) Salt Solution (+ 2.5 mL salt) Temp (°C) Salt…
A: Freezing point temperature is the temperature when liquid phase and solid phase of the substance…
Q: (a) Explain the difference between systematic and random errors. State whether the errors in (b)–(e)…
A: Error is the difference between the measured value and the true value. More the error in the…
Q: Which of the following is true regarding calibration curve? a. Most calibration curves show positive…
A: To define: Calibration curve.
Q: 1000 mL of 0.45% NaCl IV for 3 hours Drop factor: 20 gtt/mL Flow rate: ________ gtt/min
A:
Q: assify each property as intensive or extensive. Intensive Extensive Answer Bank hardness volume…
A: An intensive property is one that does not depend on the mass of the substance or system. Example :…
Q: 1. Calculate the experimental density of a salt solution and the percent error (same as relative…
A: The experimental density of a salt solution is to be calculated. The percent error is to be…
Q: 1. A chemist working in a hospital clinical laboratory obtained the following values for uric acid…
A: Since you have posted multiple questions, the answer for first question is given below. Kindly…
Q: Answer in not more than 5 sentences per question 1. Discuss the a) direct method of weighing b)…
A: Note: You have uploaded 4 different questions at same time. But i can solve only 1st que As per…
Q: Density of solution: Trial 1: 1.2 g/mL Trial 2: 1.2 g/mL Trial 3: 1.2 g/mL Average density = 1.2…
A:
Fill up the missing data
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- 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 endpointTopic: Standardization of acid and base with back titration Note: Include up to 4 decimal places Kindly explain the process Thank you!5. If the label on the bottle lists the citric acid content as 1 g per serving with a serving size of 240 mL determine the percent error in the titration results. Express result with 2 significant figures.
- 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= 0.117It is a solution of unknown concentration in which a solution of accurately known concentration is gradually added until the reaction is complete. Analyte Endpoint Indicator TitrantAssume that a drop has a volume of 0.05 mL. If a titration requires 30.00 mL for completion, what % error will each extra drop over 30.00 mL cause?
- A student carries out a titration to determine the molar mass and structure of a weak acid A. The student follows the method below. Dissolve a weighed mass of A in 100 cm3 of distilled water and make the solution up to 250 cm in a beaker. Add the solution of A to a burette. Titrate the solution of A with a standard solution of sodium hydroxide, NAOH. (a) What is meant by the term standard solution? (b) Sodium hydroxide is an alkali. What is meant by the term alkali? (c) The student carries out a trial, followed by three further titrations. The diagram shows the initial and final burette readings for the three further titrations. The student measures all burette readings to the nearest 0.05 cm3. Titration 1 Titration 2 Titration 3 Initial reading Final reading Initial reading Final reading Initial reading Final reading 27Which 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 I, Il and IV only 1, III and IV only II, III and IV only O I, II, and III onlyA drug is ordered to be administered IV at the initial rate of 4 mU/min, and may increase by 2 mu/min q 15 min to a max of 10 mU/min. The IV strength is 5 mU/mL. Construct the first two lines of the titration table for this order. O A. Dose Rate (mU/min) IV rate (mL/h) 4 mU/min (initial) 8 mU/min 36 mL/h 48 mL/h O B. Dose Rate (mU/min) 4 mU/min (initial) 6 mU/min Oc. Dose Rate (mU/min) 4 mU/min (initial) 6 mU/min O D. Dose Rate (mu/min) 4 mU/min (initial) 6 mu/min IV rate (mL/h) 24 mL/h 48 mL/h IV rate (mL/h) 48 mL/h 72 mL/h IV rate (mL/h) 36 mL/h 36 mL/h
- In an analysis of vinegar by titration, a student placed the vinegar in the buret and a measured volume of NaOH with phenolphthalein indicator in an Erlenmeyer flask. What observation should the student expect? choices a.The solution in the flask would be colorless and would turn dark pink at the end point. b.The solution in the flask would be faint pink and would turn colorless at the end point. c.The solution in the flask would be dark pink and would turn colorless at the end point. d.The solution in the flask would be colorless and would turn faint pink at the end point.Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 54.Primary standard used in the standardization of sulfuric acid a. Benzoic acid C. Sodium carbonate Sulfamic acid b. Potassium hydrogen phthalate d. 55. When a weak base is titrated with weak acid, the indicator used is a. Methyl red C. Methyl orange phenolphthalein b. Titration not possible d. 56. Quality control department where sampling and physical tests of all shipments of packaging materials is being done a. Biological Testing Laboratory d. Quality Coordinating office b. Analytical Laboratory e. Specification & Analyrtical Development section C. Material Inspection Section SPart A: Standardization of a Sodium Hydroxide Solution Titration 1 Titration 2 Titration 3 Mass of 125 mL flask 45.849g 46.715g 44.953g Mass of flask and KHP 46.849g 47.745g 46.003g Initial buret reading (mL) 0.5 ml 0.5 ml 0.5 ml Final buret reading (mL) 27.8 ml 26.5 ml 26.7 ml Volume of NaOH used (mL) 45.11 ml 45.06 ml 45.14 ml Calculations Titration 1 Titration 2 Titration 3 Moles of KHP Moles of NaOH Molarity of NaOH Average Molarity of NaOH: _______________