Which sentence is false about gravimetric analysis? a. It is used for inorganic b. It is used to assay barium c. It is used to assay of d. Relative precision 3% to 4%
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Which sentence is false about gravimetric analysis?
a. It is used for inorganic
b. It is used to assay barium
c. It is used to assay of
d. Relative precision 3% to 4%
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- 2) As an example of precision and accuracy of data, suppose the % carbon in a single compound has been measured thrce separate times by 2 different students. The theoretical % carbon is 21.34%. Student 1: trial 1:26.11%, trial 2: 26.24% trial 3: 25.92 %, Avg - 26.09 Student 2: trial 1: 20.35%. trial 2: 22.64 % trial 3: 19.79 %. Avg = 20.93 a) Which student had the more precise data and how can you tell? b) Which student had the more accurate data and how can you tell? 3a) Calculate the % error of Student 1 data in problem 2 above. Show all work below. WATCH SIG FIGSa. analytical balanceb. top-loading balancec. serological pipetted. graduated cylindere. burettef. volumetric flaskg. Erlenmeyer flaskh. beaker3. Based on the measurement uncertainty of the above instruments, which instruments would yieldthe lowest percent error?Which of the following is the Eofect'sequente t weighing using an Francis A. Santos analytical balance? I. Press Tare II. Weigh container and sample III. Weigh container A) II, II, I B I, II, II C II, I, I (D) II, I, II
- 2. Quantitative analysis student Analytical analyzed an ore sample for its lead content and obtained a mean of 4.75% Pb for five measurements. If the certified true value is 4.50%, what is the (a) percent error? (b) percent accuracy?4. Pls answer asap . Pls provide accurate answer. Help me thank uuu. Handwritten thank u.(8) Identify whether the following are examples of systematic or random error or are mistakes: a. Using an inaccurately calibrated buret. b. An uncertainty of 1 mg in the weight of your sample.∓ c. Overshooting the endpoint on your first sample, then hitting the endpoint on the remaining samples.d. Failing to let your volumetric pipet drain for a few seconds have most of the liquid has been delivered.
- Home Conte Meas Take G Three Pears Maste G 4.988 Ta X G Three G Three D Spani -> A dmacc.blackboard.com/webapps/assessment/take/launch.jsp?course_assessment_id%= 402371 1&course_id%3 94346 18&ne pps Work for students... O New Tab M Gmail O YouTube A Maps G7 Translate CHM * Question Completion Status: QUESTION 2 Three separate lab groups determined the density of a metal to be 12.5 g/mL, 13.1 g/mL and 14.8 g/mL. Use these values to calculate the average density among the measurements. O A. 13.5 g/mL O B. 30.5 g/mL ОС. 13.1 g/mL O D. 10.1 g/mL QUESTION 3 Three senarate lah grouns determined the density of a metal to be 12.5 g/mL, 13.1 g/mL and 14.8 g/mL. If the accepted deHelp 100% 4A To Public Health Ch x * HSC 258 - Major Projec X MindTap - Cengage Lea X C The Illustration To TH d%=55750828934189288909969212&elSBN=9781305657571&id=D1061392007&nbld=21... * Q Search th References Use the References to access important values if needed for this question. For the following reaction, 24.7 grams of sulfur dioxide are allowed to react with 9.95 grams of oxygen gas . sulfur dioxide(g) + oxygen(g) → sulfur trioxide(g) What is the maximum mass of sulfur trioxide that can be formed? grams What is the FORMULA for the limiting reagent? grams What mass of the excess reagent remains after the reaction is complete? Submit Answer1. Research on the limitation of accuracy of the following instruments: • analytical balance • top-loading balance • serological pipette • graduated cylinder • burette • volumetric flask • Erlenmeyer flask • beaker 2. Define the term, "measurement uncertainty". Among the instruments listed above, which ones have the highest uncertainty? Which ones have the lowest? 3. Based on the measurement uncertainty of the above instruments, which instruments would yield the lowest percent error?
- ch-Blackboard... on-CLEARED4 cientific Method? 7... 2 QUESTION 8 The mass of one mole of water is 18.02 g. True O False Click Save and Submit to save and submit. Click Save All Answers 90 #5 16 MAR 1 23 5 245 6 tv 100 7The method described above is to be used for the analysis of ores that assay about 1.2% gold. What minimum sample mass should be taken if the relative error resulting from a 0.4-mg loss is not to exceed a. -0.1% b. -0.8%28 Report Sheet Separation of the Components of a Mixture D. Determination of Percent Recovery Mass of original sample 10.588 Mass of determined (NH Cl+ NaCl+ SiO2) 1-88 8 Differences in these weights g matter recovered Percent recovery of matter %3D = %00 % g original sample Account for your errors. Combor QUESTIONS 1. Could the separation in this experiment have been done in a different order? For example, if the mixture was first extracted with water and then both the extract and the insoluble residue were heated to dryness, could you determine the amounts of NaCl, NH,Cl, and SiO, originally present? Why or why not? Consult a handbook to answer these questions. 2. How could you separate barium sulfate, BaSO4, from NaCl? 3. How could you separate magnesium chloride, MgCl2, from silver chloride, AgCl? 4. How could you separate tellurium dioxide, TeO2, from SiO,? 5. How could you separate lauric acid from a-naphthol? (See Table 3.1.)
