1. Why should the stopper always be removed from a separatory funnel whenever a liquid is being drained through the stopcock?

Q: Using the graph, calculate how many grams of NH4Cl must be added to 40mL of H2O to create a…

A: A question based on calibration methods that is to be accomplished.

Q: Cis-2- pentene and ethanol were added to an aqueous solution of bromine in two separate conical…

A: Alkenes react with a solution of bromine in CCl4 solution to form a dibromo alkane in this reaction…

Q: When 6.943 g of lysine was dissolved in 109.3 g of benzene, the boiling point was 354.4 K. What is…

A: Given, When 6.943 g of lysine was dissolved in 109.3 g of benzene, the boiling point was 354.4 K.…

Q: 6. You have a 0.5M stock solution of NaCI (Formula Weight: 58.4g/mole), a 250mM stock solution of…

A:

Q: convert 0.71 mg/ml of 4-methoxyphenyl acetate to mmol/ml and determine the percentage purity

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Q: Solubility Curve 100| NANO3 80 90 70 Pb(NO3)2 CaCl2 50 60 40 KI 30 NaCl 20 KCIO 10 Ce2(SO4)3 O 10 20…

A: Look into the graph , identify the plot of K2Cr2O7 from the plot  Amount of K2Cr2O7 crystallized  =…

Q: You need to make 14 mL of a 350 mM solution of a compound with FW 60.14. How many milligrams of the…

A: Concentration of a solution can be expressed in many ways. Here we are required to find the mass of…

Q: . You need to dilute 10 M sulfuric acid to 0.5 M sulfuric acid for your experiment. You plan to use…

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Q: How many grams of sodium hypochlorite should be dissolve in enough 1.00 L of water to produce a…

A: Answer: 50 gm of sodium hypochlorite should be dissolve in enough 1.00 L of water to produce a…

Q: In many states, a person is legally intoxicated if his or herblood has a concentration of 0.10 g (or…

A: Given, the threshold concentration level for ethyl alcohol in blood is= 0.10 g/dL  We know that,…

Q: Prepare 150 mL of a 3% agarose gel solution. Specify the following quantities necessary for this…

A: Formation of Agarose gel is a technique used to separate various macromolecules.

Q: What is the dilution factor  if 10 µL of extract is added to 990 µL distilled water?

A: Volume of extract = 10 μL Volume of distilled water = 990 μL Dilution factor = ?

Q: Which of the two cooling curves, left or right, represents the cooling of a pure solvent and which…

A: A question based on properties of liquid that is to be accomplished.

Q: Why is better separation of two liquids achieved by slow rather than fast distillation?

A: Distillation is a process in which separation of the mixture of liquids take place both the liquids…

Q: A solution has a volume of (500) ml if the solution contains 1023×3.022 partial sodium carbonate.…

A: Given that the volume of solution =500 mL(mass also 500 g because density of water is 1 g/mL)Sodium…

Q: 3. Given that for two immiscible liquids like those used in this experiment (an oil and water): P…

A: From google, we find that the vapor pressure of water at 98°C is in fact 707.3 mmHg = 0.931 atm.

Q: What is the m/v% of 2000mL of 6M HCl solution?

A: Given :- molarity of solution = 6 M or 6 mol/L                Volume of solution = 2000 ml  To…

Q: escrib

A: Volume of stock solution = 250 mL [Ammonium bicarbonate] = 50 mM = 50 ×10-3 M [ATP] = 1 mM = 1 ×10-3…

Q: Prepare 100 ml of 1.0 M ammonia solution by diluting 25% ammonia solution (ρ = 0.910). How much…

A: Given: Density of stock solution = 0.910 g/mL. Volume of solution to be prepared = 100 mL.…

Q: The solubility of magnesium fluoride in water is 0.015g/L. What is the Ksp value of magnesium…

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Q: 0.54 g phthalic acid fully dissolve in 100 ml water at room temperature. How much is phthalic acid…

A: Amount of phthalic acid dissolves in the amount of water is simply corresponding to the density of…

Q: whole number. 50 45 40 35 30 25 20 15 10 5 0 Solubility (g unk. salt / 100 g H₂O) 10 15 20 25 30 35…

A: The given question is related to the calculation of amount of salt required to dissolve in 100 grams…

Q: Using M1V1=M2V2 Make 100ml of a solution that contains 0.5mM MgCl2, 15 mM CaCl2 and 120 mM KCl 0.5M…

A: Molarity is defined as “the mole of the solute per unit volume of the solution”. It is represented…

Q: The solublity of aspirin is 0.73 g/100mL in water, and 4.72 g/100 ml in ether. If 100 mL of ether…

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Q: Compounds A and B are soluble in water and ether as shown: Solvent Compound A Compound B Water 10…

A:

Q: 7. Refer to the example in Techniques section 1.3. Suppose you had a mixture consisting of 20.0 g of…

A: Mass ratio of A to B in misture= 20 g20 g = 1:1Before recrystalization the amount of A= 20.0g - 1g =…

Q: How much drying agent, M|SO4, would be needed for drying of 20mL dichloromethane solution that…

A: Given: %(m/v) of water = 0.01 % Volume of dichloromethane = 20 mL And 1 mole of MgSO4 can absorb 7…

Q: Explain how you could separate an equimolar mixture of Compound A, B and C. (a flow chart). Organic…

A: Acid dissolves in Sodium bicarbonate and get separated by HCl.  Phenol dissolves in NaOH and gets…

Q: To what volume should you dilute 46.0 mLmL of a 13 molL−1molL−1 stock HNO3HNO3  solution to obtain a…

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Q: How much caffeine can be extracted using 50.0ml of DCM if a tea bag contains 15 grams of tea leaves…

A: Amount of tea leaves = 15 grams% of caffeine present in tea leaves = 0.9%Amount of water used for…

Q: The best purification method for separating high- vapor pressure solid from its contaminants is by…

A: Recrystallization is a process which is used to purify chemicals. By dissolving both impurities and…

Q: A solution has a volume of (500) ml if the solution contains 1023×3.022 partial sodium carbonate.…

A:

Q: he picture is 1.)A   1B.) If DHsolution for dissolving DMSO in methanol is negative, what does…

A: Enthalpy of a solution is the heat  absorbed or evolved during its formation by mixing a solute in a…

Q: Suppose that you have a 1:1 mixture of compounds that is comprised of compound X and compound Y. You…

A: The amount of solute which can be dissolved in given amount of solvent is termed as its solubility.…

Q: A 3mL sample of NaOCl solution was diluted with water and treated with 2g of KI and 10mL Acetic…

A: Here 3ml of sample of NaOCl solution was treated with 2g of KI and 10 ml CH3COOH . The solution…

Q: 2.a) Calculate the actual Concentration of Stock Solution (1) in ppm Na+. b) Calculate the Volume of…

A: Since you have asked multiple questions, we will solve first question (question-2) for you. For…

Q: What is the main difference between molecular diffusion and mechanical dispersion in terms of…

A: Answer - Contamination of ground water can result in poor drinking water quality, loss of water…

Q: Why did you measure 60 ml and not 59.04 ml to make up this final solution?

A: Rules for significant figures: All non-zero digits are significant Captive zeroes are significant…

Q: If 500 mL of a 15% v/v solution of methyl salicylate in alcohol is diluted to 1500 mL, what is the…

A: The objective of the question is to find the new percentage strength of a solution after it has been…

Q: You're an undercover biological weapons agent who has been given an unknown liquid. One of the tests…

A: The explanation is given below-