When measuring volumes of liquids, precision volumetricgraduates with calibration for measuring multiple volumes areavailable, usually with inscriptions to deliver. Examples of theseinclude the following with the exception ofSelect one:a. Pipettesb. Syringesc. Conical Graduatesd. BurettesFor solids in several pieces or powder heavier than andinsoluble in water the most convenient to use is themethod.Select one:a. Hydrostatic balanceb. Lovi's beadsc. pycnometer methodd. Mohr-Westphal balanceBalances not be situated in the following areasSelect one:a. On flat areasb. On non-vibrating surfacec. In areas of low humidityd. Areas with ventse. In areas without metal chemicals

Practical chemistry: As per our guideline we have to answer first question only.

When measuring volumes of liquids, precision volumetric graduates with calibration for measuring multiple volumes are available, usually with inscriptions to deliver. Examples of these include the following with the exception of Select one: a. Pipettes b. Syringes c. Conical Graduates d. Burettes

When measuring volumes of liquids, precision volumetric graduates with calibration for measuring multiple volumes are available, usually with inscriptions to deliver. Examples of these include the following with the exception of Select one: a. Pipettes b. Syringes c. Conical Graduates d. Burettes

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Part 1. Percent Recovery.. A student starts the recrystallization of benzoic acid experiment with 0.592 g of crude material. After recrystallization they recover a sample of benzoic acid weighing 0.305 g of pure benzoic acid. The molecular weight of benzoic acid is 122.1 g/mol. Calculate the percent recovery of benzoic acid. Please show your work and round your answer to the nearest whole number.
B. Density of Liquid 1. Obtain a sample of distilled water (any quantity of your choice) anddetermine its mass and volume. Record your data on table 3 in theexperimental report 2. Calculate the density of the water sample using equation 1 Substance Density (g/mL) Substance Density (g/mL)Aluminum 2.7 Lead 11.3Brass 8.4 Zinc 7.1 Copper 8.9 Cork 0.26Tin 7.3 Silver 10.5Bone 1.80 Rhodium 12.4Iron 7.9 Platinum 21.45 Density of Liquid Density can be determined in the laboratory by measuring the mass and volume ofa substance. To measure the density of a liquid, first measure the mass of a clean,dry beaker. Then add…
When you walked in to Mrs. Bateast's lab today, you noticed that your partner group had a 0.05432 ml mixture sample of sand and water in a beaker. When your group began the lab to separate the mixture in to different weight boats, you thought it would be very difficult to remove the sand. As a result, you added another 5.2ml of water to assist with removing it. a. Which separate method should be used to quickly and effectively separate the two substances. Explain why you chose this method. b. Determine the number of significant figures in your original sample. c. How much total mixture did you have after adding additional water. (provide the equation, calculator answer and the final answer rounding to the correct number of significant figures.
Commercial perchloric acid (100.46 g/mol) 71% (w/w) with specific gravity of was diluted by taking 1.67 15.00 ml portion of this acid and diluting with 45.00 mL of water. The final molar :concentration after dilution is Please fill in the space with a numerical value with two digits or two decimal places without units
2. In your experiment today will the percent yeild of calcium carbonate be higher, lower, or unchanged if: a. The torn-off-corner of the filter paper is discarded instead of placing it in the cone. Explain. b. The graduated cylinder is not rinsed after transferring the sodium carbonate to the beaker. Explain. c. The calcium carbonate precipitate is weighed today instead of the next lab period? Explain.
A student is measuring the density of soda using a completely-filled flask of known volume. The student performing the experiment uses a sample that contains air bubbles. The student expects that this will artifically increase the calculated density of the solution. Select the answer below that is most appropriate. The student is incorrect. Air bubbles will have no effect on the calculated density of the soda. The student is incorrect. Air bubbles in the sample will cause the calculated density to decrease. The student is correct. Air bubbles in the sample will cause the calculated density to increase. The student is incorrect. Air bubbles will react with the water to form oxygen gas, which will cause the calculated density to increase. The student is incorrect. Air bubbles will react with the water to form carbon dioxide, which will cause the calculated density to increase.
STANDARD SAMPLE PREPARATIONS FOR ABSORBANCE & CONCENTRATION DATA Concentration of stock nickel sulfate hexahydrate solution = .400 Molarity Sample Volume Absorbance Concentration (In Molarity) a 5 mL .179 10 mL .329 15 mL .588 20 mL .760 25 mL .939 Reference Blank = 0 Please show how to find Molarity, please show steps. Thank you and stay safe.
(Handwritten answer) Calculate range of volumes representing 0.1% tolerance of a 25.00 mL volumetric pipette assuming that 25.00 mL is the dispensed volume!
alculate the approximate volume of the vinegar sample needed for the analyses (Part A.1). Brand of vinegar or unknown no. Colauita tof White Wine Trial 1 1122809 Trial 2 Trial 1 Trial 2 e Guia 112.280g (12.822g 112.796 115 565 lis.9 1. Mass of flask (g) l15.603 2. Mass of flask + vinegar (g) 2.496 3.323 2,743 2,749 3. Mass of vinegar (g) B. Analysis of Vinegar Sample 2mL 7.5 23mL 32.コ 1. Buret reading of NaOH, initial (mL) 5.25mL 13ML amL 2. Buret reading of NaOH, final (mL) 33,3 31.2 1. Volume of NaOH used (mL) 2! mL a7.45 me 20.3 32.2 o i135 • 004 1 Molar concentration of NaOH (mol/L) Oi135 • 00 3 1003 , 063 5. Moles of NaOH added (mol) 6. Moles of CH,COOH in vinegar (mol) 7. Mass of CH,COOH in vinegar (g) 8. Percent by mass of CH,COOH in vinegar (%) 9. Average percent by mass of CH,COOH in vinegar (%) Calculations for Trial 1 of the first vinegar sample on next page. Experiment 10 137
I need help calculating the moles of acid and basebised and also the molarity of the base solution oles RECORD ALL DATA IN INK using the correct number of significant figures and correct units. SHOW COMPLETE "SET-UPS" (and the rounding off) for all calculations for Part 3 on the bottom of this page or on a separate sheet. 3. Standardization of the NaOH Solution: Titration No. Acid buret, Final reading Initial reading Volume of acid used Moles of acid used Base buret, Final reading Initial reading Volume of base used Moles of base used Molarity of base solution Set-ups: 1 2 3 24ml 36. 24ml 12- 12 m 12ml Average Molarity of the NaOH solution Average Deviation 13 25.5 13 13 12.5ml 12 mil. 31.5 4 5 6
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When performing the water displacement method , this observation will increase the volume of the specimen a. bubbles are produced b. the specimen floats c. mass was not accurately taken