_____1. Which of the ff you can NOT use to measure liquids? a) beaker b) serological pipet c) graduated cylinder d) volumetric pipette _____2. It can be used to contain samples for heating with flames >400 °C a) test tube b) O-ring c) Bunsen burner d) crucible with cover _____3. The ff can be used for boiling a solution of salt, EXCEPT a) beaker b) Bunsen burner c) Buchner funnel d) Wire gauze ____4. Which of the should be used when you want to separate OIL and WATER? a) buret b) separatory funnel c) buchner funnel d) Pasteur pipette

Q: An iytravgnoavvolution calls for addition of 25 mEq of sodium bicarbonate.How many milliliters of…

A: W = E N V/1000 Where, W = mass of solute in g, E = equivalent weight of solute, N = Normality and V…

Q: Which is NOT a part of a hot-filtration set-up? a. Normal filter paper (3:1) b. Pre-heated receiving…

A:

Q: Which of the following involve separation of compounds based on their boiling point? extraction…

A: Extraction : The process of separation of compounds from a mixture is called extraction.…

Q: Table 2. Multiple Extraction of Caffeine Percent Caffeine (%w/w) Trial No. Mass Sample (g) Mass…

A: Percentage by weight %w/w     %w/w=Mass of component Mass of same×100%Then,Trial No.1-…

Q: Which fraction or extract is/ are positive for Guignard test? A. Aqueous fraction B. Hexane C. Ethyl…

A: A. Aqueous fractionExplanation:The Guignard test detects the presence of cyanogenic glucosides,…

Q: What is the importance of paper chromotography?  What is the usage of paper chromotography in the…

A: Paper chromatography is a chromatography technique that is used for separating colored pigments…

Q: Based on the first set of numbers, please help solve the rest.

A: Detailed explanation:  To solve the gas chromatography of lime oil problem, we need to calculate the…

Q: When isolating the solid after recrystallization using vacuum filtration what solvent should you use…

A: Generally during vacuum filtering, crystals are washed with the solvent you used to recrystallize…

Q: The paper used in chromatography is made of molecules with___parts A polar  B nonpolar

A: The  paper used in chromatography is made of cellulose fibre molecules.

Q: 7. Describe two ways to fold a filter paper to be used for filtration. Include diagrams for the…

A:

Q: How does chromatography separate the components of leave samples? 2. Can you use chromatography…

A: In a chromatographic system, the sample is transported through the stationary phase by a liquid or…

Q: When isolating a solid compound after recrystallization, which is the appropriate technique to use,…

A: Recrystallization is an experimental technique of separating pure compound from the solution…

Q: Question 2 A mixture of cyclohexane (b.p 81 °C) and toluene (b.p 110.8 °C) need to be separated and…

A: Given that, a mixture of cyclohexane (b.p 81 °C) and toluene (b.p 110.8 °C) needs to be separated…

Q: When you prepare your sample to run through the column chromatography , what is the first proper…

A: For the column chromatography the sample should be properly dissolved in an appropriate solvent

Q: Compound Phthalic Acid *Formula: C ₂ H 6 Ou Naphthalene Water Methanol Structure tot +0! 04

A: This is a simple question about the structure of organic compounds.

Q: Write three (3) things in your mind when you heard chromatography?

A: Given  Experiment: Chromatography Chromatography is the analytical technique used to isolate the…

Q: Calculate theoretical yield for the synthesis of aspirin.

A: The equation shows that salicylic acid reacts with acetic anhydride to form aspirin and acetic acid…

Q: "Cold filtration" is used during recrystallization to: Select one: a. Remove insoluble impurities O…

A: Cold filtration is the rapid filtration where solution is cooling then filtrate. When the solution…

Q: Match the set-up with the appropriate separation technique. : filtration * distillation

A: In the given question, the experimental setups of two separation techniques are provided and they…

Q: which method generally separates greater masses of sample? a) high performance liquid chromatography…

A: Different methods are employed to separate the component in a given sample.  Examples-  thin layer…

Q: 5.Where should the thermometer bulb be located in the following setups? a. a microscale distillation…

A: a) Answer -

Q: it about 1 cm from one end. Using colored marke spots of color on the center of the line. lass…

A: Concepts of Thin Layer Chromatography.

Q: Chromatography

A: Chromatography is a technique used for separation of mixtures. A fluid called as mobile phase is…

Q: I have 1 gram of sample, and add 0.1 mL of a 50 ug/mL solution of atrazine. I extract with 10 mL of…

A: Ans. Spike Recovery or spike and recovery is a method used to determine that whether an analyte…

Q: Use the dropdown menus to indicate whether a solvent pair could be used successfully in a…

A: Ideal properties of mixed solvents in recrystallization: 1) The compound should be readily soluble…

Q: Which of the following statement is false?   a.   Component with the strong attraction to the…

A: The statement, which is false has to be identified.

Q: What could have gone wrong in the separation and purification process to result in the disparity…

A: According to option A if benzoic acid and sand are weighted in wrong way then it is very possible…

Q: 2. Regarding the extraction experiment, which of the following statements is true? a) A drying agent…

A: TLC, or Thin Layer Chromatography, is a chromatographic technique used to separate and analyze…

Q: 1. Which of the following is the best option for transferring 20 mL of a solution? a.Use a 5mL…

A: 1. We have to tell the best option for transferring 20 mL of a solution. Now, we know that among…

Q: If the original gravity is 1.03 and final gravity is 0.96, calculate the percent alcohol content…

A: Alcohol by volume percent = (original gravity-final gravity)/0.00753

Q: UV-Vis Absorption is a type of O data base system O injector detector O pump Gas chromatography is…

A: Given,  UV-Vis absorption

Q: Which of the following chromatographic methods cannot use a mixture of liquid solvents (eluents)…

A: Chromatographic separation porocess and eluent for chromatographic separation.

Q: Calculate serial dilution. If we pipette 1 mL of sample into tube of 9 mL of 0.1 peptone water.…

A: A stock solution made from 25 g of sample, for whom calculation for serial of dilution is to be…

Q: 1. In thin layer chromatography (TLC), why do you need to use a pencil in marking the spots, origin,…

A: 1. Marker spot is soluble in the solvent. Therefore it will move on TLC plate with solvent. 2.…

Q: 26. In a certain paper chromatography experiment, the Ri values of components X, Y, and Z are 0.25,…

A: Mixture is a type of matter which is composed of two or more substances. These are called as…

Q: 1. Place 5 mL of starch solution in each of 2 test tubes. 2. Heat the test tubes to boiling and add…

A:

Q: Which  statement is valid when the multiple extraction and single extraction  is compared.     The…

A: Single extraction is the extraction in which only single extraction is done hich is one step whereas…

Q: After you collect a fraction from the column, how do you remove the solvent to get the pure…

A: Solid crude compound purify by column chromatography. Crude contains two or more compound. Column…

Q: The uses of thin layer chromatography are: 1) To identify unknown compounds 2) Determine purity of…

A: The correct answer is given below.