4.A student carried out a simple distillation on a compound known to boil at 124°C and measured a boiling point of 116-117°C. Gas chromatography(a technique for assessing purity)showed that the compound was pure and a calibration check on the thermometer was positive. What might be wrong with the distillation apparatus setup?

Q: The method of standard additions was used to determine nitrite in a soil sample. A 1.00-mL portions…

A: The linear relationship between the concentration of absorbing species and the absorbance is known…

Q: Consider the structure of testosterone to identify the best suitable quantitative analysis for…

A: The steroid hormone testosterone is very significant. Total testosterone levels in healthy,…

Q: In the Analytical Chemistry – I laboratory Ms. Bushara Al Busaidi wanted to prepare NaCl solution.…

A: Molarity is defined as number of solute present in 1000 ml of solution . Mole=…

Q: In a fractional distillation of a cyclohexane/toluene mixture the effectiveness of the distillation…

A: The solution is given below -

Q: Assume that vinegar is 5% acetic acid (by mass) at a density of 1.01 g mL-1.  This means that 100 mL…

A: The answer is given below

Q: A calibration curve of ZnCl2 conductivity (y-axis) vs concentration (mass percent, x-axis) is made.…

A: In the linear regression plot, the X-axis represents the mass percent of ZnCl2. The Y-axis…

Q: The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the…

A: Given that: the initial volume of sample = 100.0 μL diluted volume = 2 mL +100.0 μL  concentration…

Q: solid disappears.

A: According to the given data the solid is soluble in liquid and we have to separate the two.There are…

Q: Consider a scenario wherein a mixture containing 1.52 x 10-3 M Sr²+ and 3.46 x 10-³ M F was…

A:

Q: Analysis of a chromatogram of a mixture containing 0.0124 M analyte and 0.0448 M standard found that…

A: Known concentration of analyte = 0.0124 M Initial concentration of standard = 0.0448 M Area of…

Q: Data: (make sure to include appropriate units) Unknown number 1.509g Trial 1 Trial 2 0.51ml 1.15ml…

A: • In a balanced chemical reaction the reactants react and products form in the molar ratio of their…

Q: 3. What is particulate gravimetry? When do we use this technique?

A: As per bartleby guidelines I answered only first question so please don't mind.Thanks in advance.

Q: 2. A prescription balance has a sensitivity requirement of 5 mg. Using this balance, how would you…

A: Sensitivity Requirement = 5 mg  Error = ±5%  Amount of drug needed = 12 mg  So we have to find…

Q: Which of the following statements is true?   After drying a sample in the oven, you can place it…

A: There are three types of substances or matter. These three types are solid, liquid and gas.…

Q: It is always important to label everything in the dispensary or the medicinal chemistry laboratory.…

A: We can use two different techniques to distinguish between Aspirin and paracetamol namely…

Q: hardness is 25 mg/L and permanent calcium sulphate hardness 25 5. A sample of water was analyzed and…

A: Hard water is one that does not forms lather with soap. It contains soluble salts of Ca2+ and Mg2+.

Q: Emily attempts to separate a mixture of iodine crystals, table sugar, and iron powder. First, she…

A:

Q: OTI T 12. At one time, silver sold for $5.03 per ounce. If the density of silver is 10.5 g/cm2,…

A: Given: Density of Ag = 10.5 g/cm3. Volume of Ag = 8.91 cm3  And price of Ag = $ 5.03 per ounce.

Q: The ingredients contained in grape Kool-Aid can be approximated as: water (H2O, density = 1.000…

A: Given: Volume of solution = 500 mL = 0.500 L                         (Since 1 L = 1000 mL) Mass of…

Q: Color BEFORE adding Color AFTER adding Intensity of color AFTER adding FeCl3 Test Tube # FeCl3 FeCl3…

A: Using a melting point apparatus, Determine the melting point of obtained crude aspirin and…

Q: In the filtration step, the product is washed with "two 4 ml portions of ice-cold water". Explain…

A: Filtration is a type of physical separation method. In this method usually solids are separated from…

Q: ayer Mass of Erlenmeyer Flask Calcium Hydroxide olution (lime water) Mass of Calcium Hydroxide…

A: Titration of Calcium Hydroxide (Ca(OH)2) with Hydrochloric acid (HCl) is- Ca(OH)2 + 2HCl…

Q: Which was the yield?

A: Molarity = number of moles/volume (in L)  Moles = molarity x volume (in L)   Percent yield = [actual…

Q: After performing precipitation gravimetry, Asta placed the weighing form inside the crucible, heated…

A: The average of these masses is : 23.1136 + 23.2125 + 23.4120 + 23.11394 = 23.2130

Q: pure density liquid A. 31. What is the density of a mixture that is 2.3 moles A and 2.7 moles B?…

A:

Q: hich type of distillation is suitable for "less drastic conditions"?

A: Distillation  It is a separation technique that can be used to either increase the concentration of…

Q: If we have a salt solution with a density of 1.2g/cm^3 and a metal bar with a density of 8.96g/cm^3,…

A: Given : density of salt solution = 1.2 g/cm3  Density of metal = 8.96 g/cm3  And mass of both = 100…

Q: The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the…

A: The volume of the diluted solution in L is; 1μL=1×10-6 L1 mL=1×10-3 LVt=2.00 mL+100.0 μL=2.00×10-3…

Q: 2. What total dilution would you need to produce a 2 mM sample from a 100 mM stock solution?

A: M1 x V1 = M2 x V2

Q: In 1993 the Minnesota Department of Health set a health risk limit for 1,2-dlbromoethane In…

A: Given information,    Health risk limit of 1,2-dibromoethane is 4.00 ng/L.    Volume of water sample…

Q: A student weighed approximately 1.5 g of an unknown solid acid and carefully placed the sample in a…

A: Let the dibasic acid be H2Y It will be neutralized by NaOH in the following way:- H2Y + 2NaOH  =…

Q: Which of the following statements is true? A After drying a sample in the oven, you can place it…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: 3. Calculation of %v/v acetic acid: HINT: you will need to use the density of acetic acid (1.05…

A: We have given that the molarity of acetic acid is = 0.212M Density of acetic acid = 1.05g/ml To…

Q: This is my 2nd attempt to receive help with this problem. The previous expert confused me by saying…

A: According to the VSEPR theory, the geometry of the molecule depends on the number of bond pairs and…

Q: What is the answer to the following calculation, to the correct number of sig figs?…

A: What is the answer to the following calculation, to the correct number of sig figs?

Q: Data Set Exp.5 Use the following data to determine the mass percent of the active ingredient in…

A: Calibration curve It is the standard curve used to determine the concentration of unknown sample…

Q: Write a step-by-step procedure for this serial dilution. • The stock concentration of the blue dye…

A: In this problem we need to prepare different concentrated solution from a particular solution given.…

Q: Explain what would happen in a distillation if a student placed the thermometer bulb above the…

A: Answer -  Distillation - Distillation, or classical distillation, is the process of separating the…

Q: Which of the following is not a feature of carrier gas used in gas chromatography? a.It should be…

A: The features of carrier gas used in gas chromatography are - - > 1 -It should be cheap and easily…

Q: 4. Assuming no calculation errors, why would a percent recovery > 100% or a percent recovery < 100%…

A: When product is recovered as predicted then  % of recovery &lt; 100 %

Q: Julie has been asked to measure the concentration of a sample solution using a spectrophotometer.…

A: Final concentration =5.5X10-5m Final volume =250 ml                              =250X 10-3 l{since…

Q: A pipet is used to transfer 5.00 mL of a 1.25 M stock solution in flask "S" to a 25.00-mL volumetric…

A: Molarity of a solution is the moles of solutes that is divided by the volume of the solution in…

Q: What are the functions of the graduated cylinder and distillate in a distillation set-up?

A: In the process of distillation, generally we separate the liquid from non volatile solid heating at…

Q: 2.) Five standardized dilutions of aqueous lead(II) chromate solution were prepared by adding a…

A: For the given question, we have to determine the number of moles of PbCrO4 present by using the…

Q: 1. Prepare a 2 M NaCl soln; 1000 ml final volume; MW = 58.5 grams

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 1. Discuss the following: a) direct method of weighing b) indirect weighing using the analytical…

A: According to Q&amp;A guidelines of Bartleby, we are supposed to answer only the first question out…

Q: 2.) Five standardized dilutions of aqueous lead(1I) chromate solution were prepared by adding a…

A:

Q: compounds with boiling points at 154°C, and 167°C at one atmosphere, how many plates will be…

A: When the boiling points of the two compounds is too close we need to use fractional distillation…

Q: When purifying a sample of aspirin that was produced in the lab, the impure aspirin sample should be…

A: Given: When purifying a sample of aspirin that was produced in the lab, the impure aspirin sample…

Q: A physician requests that an iso-alcoholic elixir containing 30.0% alcohol be prepared. How many mL…

A: Given, Total volume of solution= 1000ml % iso-alcohol elixir for final solution = 30% % low…