Calculate serial dilution. If we pipette 1 mL of sample into tube of 9 mL of 0.1 peptone water. Sample is 25 g of meat which was mixed with 225 mL of sterile peptone water. Make further dilutions up to 10 -10.
Q: In vacuum filtration, the filter paper should be wet before the final product solution is poured…
A: In vacuum filtration, the filter paper should be wet before the final product solution is poured…
Q: 10. Fractional Distillation: This lab was viewed via a video and described in detail in lab class.…
A: The purity furnishes information about the presence of a single compound or a mixture of compounds.…
Q: арply. to determine a suitable solvent system for recrystallization to monitor the progress of a…
A:
Q: True or false. A primary standard solid must be weighed accurately and diluted to an accurately…
A: Analytical chemistry.
Q: 5. Discuss how melting points of the impure sample and recrystallized sample could have been used to…
A: Melting point is the temperature at which there is a change from the solid to the liquid state i.e.…
Q: Study the table below and identify the best solvent for recrystallization for compounds A, B, and C.…
A: Solution- Data given- Solubility data in Hot and cold solvent.
Q: If you are performing a solvent extraction using 1M NaHCO3 and Dichloromethane (Density = 1.325…
A: Solvent extraction is a process of separating the dissolved compound from one solvent by using…
Q: why would you add 10 mL of concentrate to 490 mL of water if you were instructed to dilute the…
A: Given : To dilute the concentrate to 1 : 50. And total volume of solution to be made = 500 mL =…
Q: is water a good solvent for recrystallization for acetanilide based on the image?
A: The answer is as follows:
Q: To prepare a 13x dilution of a bacterial culture in a final volume of 38ml, how much of the original…
A:
Q: I have 20 ml of a bacterial culture. After preparing a serial dilution as shown below and plating…
A: Given: Volume plated on the petri dish = 0.2 mL cfu counted = 45
Q: Calculate the average and standard deviations for each solution (and solvent).
A:
Q: What are the dispersed phase and dispersion medium in milk?
A: Dispersed Phase: The phase or particles which are present in the form of colloidal particles is…
Q: Hydrogen Peroxide. Two day treatment of 200mg/L. Day one: 35% PeroxAid Day two: 31% PeroxAid Fish…
A:
Q: week. Procedure 2: repeat the procedure. This time use 50:50 mix of methanol and water for…
A:
Q: Which of the following is the best option for transferring 20 mL of a solution? A Use a 5ml…
A: Since you have posted multiple questions, we are entitled to answer the first only.
Q: In 6.75g of distillate >130C. After performing all necessary GC calculations, it is determined that…
A:
Q: Data Sheet with Sample Results Note: results that require calculations are purposely left blank and…
A: Solution Mass of NaCl dissolved = (mass of beaker+stirring bar+NaCl)-(mass of beaker+stirring bar) =…
Q: 50 g of salt was dissolved in 250 g of water. Find the mass fraction of salt in the extracted…
A: Mass fraction: It defined as WB = mb/m
Q: What should be done if the percent recovery is greater than 100%? Should the recrystallization…
A: The maximum percent recovery one can get is 100%. If one is getting more than that it's means there…
Q: The density of the first fraction collected would be expected to be close to a value of ______.…
A:
Q: Using your graph from the previous question and referring to the equation below, use the trendline…
A: The equation which you have found from the curve is, => Y = 1342.5 X where Y = Absorption And X…
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: show how you are going to prepare your calibration standards.
A: WE need to prepare multiple solutions of 50 mL each using the 500 ppm stock solution such that the…
Q: Imagine you are an organic chemistry student who isolates a crude sample of salicylic acid following…
A: The melting point is largely dependent on the impurities present in the substance. If there are…
Q: In this experiment, the mass of pure copper provided is 0.491 gram, and then it was dissolved in…
A: Given Mass of pure Copper is 0.491 g. Volume of original solution as 100 mL. Volume of diluted…
Q: What is the tolerance na 100-ml volumetric flask? a. 10.16 ml O b. +0.40 mL OC. 10.05 mL O d. 10.60…
A: Volumetric flask is used in the measurement of volume of liquid for various purposes in…
Q: a) Compounds with low boiling points tend to spend less time in the gaseous state than compounds…
A: The questions are based on the concept of gas chromatography. it is an instrumental technique of…
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: 10 grams of compound A is dissolved in 50ml water Methanol will be used to extract A form water…
A: Extraction is the process of separating a desired substance by transferring the substance from one…
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: Make a results and discussion in Laboratory Report Format of the following: 1. Separation of…
A: As per our Company guidelines, we are supposed to answer only first three sub-parts. Kindly repost…
Q: Which of the following is the best option for transferring 20 mL of a solution? A Use a 5mL…
A: The transfer of liquids and solution uses various types of apparatus and instruments depending on…
Q: for effective purification by recrystalization while avoiding performing a hot gravity filtration,…
A: Recrystallization is used to purify a sample.
Q: the extraction
A: The question you uploaded is multiple questions. According to the Guidelines, if there are multiple…
Q: Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase…
A: Given: Concentration of standard Caffeine used = 0.70 mg/mL Concentration of standard Benzoate used…
Q: Chemistry 1) Take 1 mL of a liquid bacterial culture (aka original culture) and mix it with 9 mL of…
A:
Q: Which is the most appropriate way to dispense liquid using a dropper (vertical, 45° angle, or…
A: Dropper is a device used to transfer small quantities of liquids.
Q: 1. Using a burette, measure the cyclohexene (6.0 mmol) and transfer to a 125 mL erlenmeyer, along…
A: According to the given procedure, required millimoles of HCl = 14.9 mmol Molarity of HCl, C = 12.5 M…
Q: Mix 3 mL of ethyl alcohol, 1 mL of formic acid and 2 drops of conc. Sulfuric acid in the third test…
A: Formic acid is not a typical carboxylic acid; it is distinguished by its acid strength, its failure…
Q: In recrystallization, crystals gathered are washed with cold solvent. What would its effect on…
A: When a reaction is carried out, the product obtained is mostly accompanied by some other substance…
Q: What roles do solvent, density and polarity play in liquid/liquid extraction
A: i. Solvent = In liquid - liquid extraction, the solvent which is needed to be extracted should not…
Q: You have 100 mL of a solution of benzoic acid in water; the amount of benzoic acid in the solution…
A: Volume of benzoic acid solution = 100 mL Mass of benzoic acid in solution = 0.30 g Distribution…
Q: How to get maximum % recovery from recrystallization and crude weight
A:
Q: For this chemistry problem, I am stuck on what the reactants and products are in order to determine…
A: (a)Product A is Cu(NO3)2 and it reacts with NaOH giving Cu(OH)2. The reaction between Cu(NO3)2 and…
Q: What is the concentration of HI being serial diluted 6 times with a total dilution factor of 106?…
A: Given: Concentration of stock HI solution = 120 mM = 0.120 M (Since 1 M…
Q: Mud filtration test to determine volume of filtrate and the ermeability of mud cake collected after…
A: Given that Permeability of mud cake collected after 30 min
Q: MAKE A METHODOLOGY : MATERIALS/ REAGENTS WITH SCHEMATIC DIAGRAM . THE PICTURE UPLOADED SERVES AS A…
A:
Q: ASSAY Calibration solutions Calibration solutions of naproxen in the range 5 – 25 μg/mL were…
A: Solution- Data given- 12.3819 g were crushed to a fine powder, acetic acid (0.05 M)
Q: How many ml of media do you add to 5ml of bacterial culture if you want to dilute it a) 3x, b) 4x,…
A: We have to tell the volume of media in mL needed to add 5 mL of bacterial culture, to dilute it a)…
Step by step
Solved in 2 steps
- 5.00 ml of the 1.0 x 10-4 M CV stock solution is first diluted to 100.ml. Then 1.00 ml pf this solution is diluted again to 50.0 ml. What is the final concentration?Quantity 800 mg 0.5 ml 5ml 25ml 4. Ingredients 1. Acetaminophen 2. Alcohol 3. Glycerin 4. Cherry syrup 5. FD&C red q.s 6. Citric acid q.s 7. Water q.s to 50 ml Calculate the %v/v of Alcohol in the above formula.Prepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%. Write complete solution using padpaper.
- 2. You need to make 500mL of 7H9(+) media with 1X ADN and 30ug/ml. of the antibiotic kanamycin. Your stock solutions are 10X ADN and 30mg/mL of kanamycin. The solvent is distilled water. How much of cach component will you need to make the desired final solution?Q/ Prepare 0.1 N and 0.1 M of 98% H,SO, in 250 ml. M.wt of H,SO, = 98 g/mol, and its Specific density (SP.gr.) = 1.09 .In a test tube, dissolve 10 drops of methanol in 3 ml. of water. Oxidize a copper wire spiral by passing it through a Bunsen burner. Plunge the red-hot wire into the alcohol solution several times, cooling the solution under the tap (faucet) so as not to evaporate too much of it. Next, add 1 drop of 0.5% resorcinol solution. Measure 2 ml. of concentrated sulfuric acid (CAUTION!) and pour this carefully down the sides of the test tube containing the mixture. Note the color of the zone intermediate between the acid and the solution. RESULT:
- How many grams of a 25% v/v hydroalcoholic solution should be used in preparing 32 fl.oz. of a 5% v/v solution. Specific gravity of the stock solution is 1.52.Q/ Prepare 0.1 N and 0.1 M of 98% H,SO4 in 250 ml. M.wt of H,SO4 = 98 g/mol, and its Specific density (SP.gr.) =1.09 . tousityxioBiological studies have found that aqueous solutions containing as little as 28 µg of allicin per milliliter inhibit bacterial growth. Express this amount as the number of moles of allicin per liter of solution. \(28~\text{ug/mL}=\) \(text{mol/L}\) 20 F3 II F8 F4 F5 F6 F7 F9 F10 F11 F12 & %24 4. 3 5 7 9 { } P E T Y U %3D * CO R %23
- 18. You need to dilute 10 M sulfuric acid to 0.5 M sulfuric acid for your experiment. You plan to use 100 mL of your diluted solution. How much of the concentrated solution do you need? Hint use M₁V₁=M₂V₂ 0.5 mL 5 mL C. 50 mL d. 500 mL a. b. (10M)V₁ = (0.5)(100ml) sob (10) = 500 1.05 10Q/ Prepare 0.1 N and 0.1 M of 98% H₂SO4 in 250 ml. M.wt of H₂SO4 = 98 g/mol, and its Specific density (SP.gr.) = 1.09.Question 8 of 10 Submit A solution is made using 200.0 mL of methanol (density 0.7920 g/mL) and 295.1 mL of water (density 1.000 g/mL). What is the mass percent of the methanol? % 1 2 3 4 7 8 9 +/- x 10 0 Tap here or pull up for additional resources LO