In relation to this question: Compute for the actual moles of acetic anhydride and 1-pentanol used in the experiment using the following data: Acetic anhydride: 29 mL , sp.gr. 0.811g/mL and MW. 102.09 g/mol 1-Pentanol: 26 mL , sp.gr. 0.916g/mL and MW. 88.15 g/mol Which reactant is in excess? Why it needs to have more excess reactants to drive the reaction forward?
Q: What percent of X can be extracted with 100 mL hexane? b) What will be the percent X remaining in…
A: The question is based on the concept of solvent extraction. we have to calculate amount extracted…
Q: How would the following errors change the calculated value of the percent oxalic acid in the…
A:
Q: Can you please answer question 1 and all of the sub problems please and thank you
A:
Q: Which statement is valid when the multiple extraction and single extraction is compared.
A:
Q: Which solution is of known concentration that is used to react completely with an analyte?…
A:
Q: DETERMINATION OF BIOLOGICAL OXYGEN DEMAND USING THE MODIFIED WINKLER METHOD GUIDE QUESTIONS: 1. What…
A: Note - Since you have asked a question with multiple sub-parts, we will do the first three sub-parts…
Q: Please give clear handwritten answer calculated logp of the following two drugs & show workings..?
A: IN LogP , P is the prtion coefficient and this are experimental
Q: wo salts A and B are dissolved in water. At the temperature of the experiment, the solubility of A…
A:
Q: Materials and detailed methods: paragraph or two explain how the experiment was done Raw Data:…
A: Diels -Alder reaction takes place in reactions between conjugated diene and an alkene. In this…
Q: Sources of Error Determine the relationship between the observed/apparent value (EX) VERSUS that of…
A: Given: Not all the solid was transferred during the filtration of the precipitate.
Q: Tap water is measured for arsenic and found to have a mean signal of 0.0061. Next, a small amount of…
A: Concept: Lower limit of quantitation: A signal that is 10 times greater than the noise or the…
Q: A new method for the determination of cholesterol in serum is being developed in which the rate of…
A: Given data:
Q: For the extraction of acid from a mixture of carboxylic acid and biphenyl you began with 200 mg of…
A: Percent recovery can be calculated using the initial amount and amount recovered.
Q: the heat of combustion of benzoic acid. based on the data and the graph, what is the drift rates…
A: The initial drift rate (dT/dt)i is the slope of the graph till the (ti,Ti) and the final drift rate…
Q: Vitamin C Analysis, a student accidentally puts 1.0 g of sodium bicarbonate (NaHCO3) solid into the…
A: The sodium bicarbonate (NaHCO3) solid is a base which neutralises the acid in the reaction. Hence it…
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: 2. Are the measured values within 50 mV of the theoretical values? Is there one particular redox M/M…
A: Given data are :
Q: PROBLEM SOLVING: REPORT QUANTITIES IN THEIR PROPER SIGNIFICANT FIGURES. NO NEED TO TYPE UNITS IN…
A: Eudiometer is used to find the volume of a gas produced during a chemical reaction. It is also used…
Q: ulate uie imolanty of 100 fmg oi Caco3 (Imol Wi. 100) in 10 mi of water. b. How many grams of CaCO3…
A:
Q: Partition (or Distribution) Coefficient I best way to think about this is to start with a solute…
A: In the given problem we have to describe why the set of liquids used during the solvent extraction…
Q: What are the products for the equation below: Balance this equation, Place a "1" where expected.…
A: Single replacement reactions: In such reactions, one of the reactants replaces the other one in…
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: It may help to keep the following equation in mind as you work Kw = [H3O*][OH¯] = [1× 10-7 M|[1 ×…
A: PH=7 Neutral PH>7 Basic Ph<7 Acidic PH=-logH+ POH=-logOH- PH+POH=14
Q: Kinetic Data Collection Time, t (s) Volume of added base (mL) Flrst additlon 40 0.50 Second addition…
A: Given: Concentration of NaOH stock solution = 0.01 M Concentration of t-BuCl stock solution = 0.2 M…
Q: At what stage was the internal standard added to the prepartions, in the protocol of this…
A: Step : 1 The required answer for the above question is follows as :
Q: Distribution Coefficient - Please help write conclusions based on results provided. Thank You!
A: The mass of acid in ethyl acetate after single extraction = 0.1072 g And, the mass of acid in ethyl…
Q: Data Collection Kinetic Data Collection Time, t (s) Volume of added base (mL) Flrst additlon 40 0.50…
A: Given: Concentration of NaOH stock solution = 0.01 M Concentration of t-BuCl stock solution = 0.2…
Q: In the Analytical Chemistry laboratory, one of the B.Sc student Ms. Fatma wanted to analyze the…
A: Spectrophotometer
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: Percent yield of methyl 3-nitrobenzoate(show working..include compound name or abbreviation)?…
A: Theoretical yield is calculated on the basis of the stichometry of the chemical equation. The…
Q: If some of the unkown was stuck to the side of the test tube or otherwise did not dissolve…
A: Given: Some of the unknown is not dissolved.
Q: kindly help me with this problem thank you ill give like for the answer mixture consists of a…
A: You have to supply distribution coefficient . I am solving that by considering distribution…
Q: 1) Comment on the Pearson’s R of the generated line equation, before you compute for the unknown…
A: We are given the concentration and absorbance data for the standard reference solution. Also the…
Q: If a student used all of their unknown for the first trial of the MW by Vapor experiment, how would…
A: During an experiment different trials are conducted to get an accurate or precious observation.
Q: What are the different methods to pack a column? Point out two ways in which thev differ from each…
A: A question based on analytical separations that is to be accomplished.
Q: Estimation of Dissolved Oxygen experiment I want 10 Precautions at lest for this experiment
A: Precuations
Q: The student then determined ΔH neutralization for the reaction of sodium hydroxide and acetic acid,…
A: First calculate moles of each reactant by multiply MOLARITY and volume then find out limiting…
Q: In this experiment, the problem is that the volume of the volumetric pipet is not accurately known…
A: As we know density and volume are related to each other Density = mass/ volume As volume is…
Q: In the single solvent recrystallisation of benzil with methanol, where will a methanol insoluble (in…
A: A multiple choice question based on purification, which is to be accomplished.
Q: During Buchner filtrati on a portion of the filtrate isused for swirling the resi due into the…
A: SOLUTION: Step 1: A Buchner funnel is a piece of laboratory equipment used in filtration. It is a…
Q: A student forgot to add the mass of the unknown solute in trial 1 to the mass of the solute that was…
A: Mass = ( m1+m2 ) divided by 2
Q: DATA FROM RECRYSTALLIZATION EXPERIMENT Weight of crude benzoic acid, g 0.2498 Weight of filter…
A:
Q: DATA Table Trial 1 Trail 2 Trial 3 Mass cleaning solution (g) 10.1 10.1 9.8 Mass vinegar added to…
A: Acidity of vinegar solution = 5% Mass of acetic acid present in 100 g of vinegar solution = 5 g Mass…
Q: Dissolve 1.7 g in a mixture of 2 ml. of nitric acid (-130 g/l) TS and 40 ml of water, and proceed as…
A: The analyst recorded a weight of 1.8652g of sample using an analytical balance.
Q: What could be the assumption when the MW of the sample does not match calculated molecualr weight…
A: Vapour pressure depression, boiling point elevation,freezing point depression are the example of…
Q: Data Sheet with Sample Results Note: results that require calculations are purposely left blank and…
A: (7) Mass of NaCl dissolved : Mass of NaCl dissolved = (Mass of 50mL beaker + Stirring bar + NaCl) -…
Q: When measuring iron in river water by spectrophotometry using the ferrozine reaction that is…
A: A question based on analytical process that is to be accomplished.
Q: Given the Callibration Data, please give the: Calibration curve graph, equation of the line, and…
A: The relation between absorbance and the concentration is given by the Lambert-beer's law as follows;…
Q: reparation of 0.25N NaOH Objective: Apparatus and Materials: Procedure : Calculate the exact mass…
A: 0.25N NaOH 1 litre N stands for normality To prepare normal solution, we take gram equivalent weight…
Q: After the extraction process, the organic solvent containing the organic compound was cooled and…
A: The transfer of the substance from one solvent to another solvent by the process is termed the…
In relation to this question:
Compute for the actual moles of acetic anhydride and 1-pentanol used in the experiment using the following data:
Acetic anhydride: 29 mL , sp.gr. 0.811g/mL and MW. 102.09 g/mol
1-Pentanol: 26 mL , sp.gr. 0.916g/mL and MW. 88.15 g/mol
Which reactant is in excess? Why it needs to have more excess reactants to drive the reaction forward?
Why is the use of ice bath in the experiment necessary?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- In this experiment, the problem is that the volume of the volumetric pipet is not accurately known (only 2 sig figs), so any density calculation will also be limited to 2 sig figs. Calibration increases the number of sig figs from 2 to 4. As a result, the density also increases from 2 to 4 sig figs. Explain how and why this is possible.DATA Note: Use the videos as references except when data is provided here. Table 1. Selection of Recrystallizing Solvent. Solvents Dissolution at room temperature? (+ or −) Dissolution at elevated temperature? (+ or −) Distilled water - - Acetone + n/a 95% ethanol - + Toluene + n/a Solid sample: Naphthalene Table 2. Mass Measurements. Mass, g Sample solid 0.5021 Empty watch glass 35.7602 Watch glass with recrystallized sample 36.2485 Table 3. Melting Point Determination. Temperature, oC Appearance of Sample in Capillary Tube … Solid 78.4 Solid 79.3 Solid with signs of liquid 79.9 Solid, liquid 80.6 Liquid, solid 81.3 Liquid with signs of solid … Liquid Theoretical Melting Point, oC: 80.2°C (176.4°F) QUESTIONS Which solvent should be used as the recrystallizing solvent? Check if your chosen solvent satisfies all characteristics of a good…Compute for the actual moles of acetic anhydride and 1-pentanol used in the experiment using the following data: Acetic anhydride: 29 mL , sp.gr. 0.811g/mL and MW. 102.09 g/mol 1-Pentanol: 26 mL , sp.gr. 0.916g/mL and MW. 88.15 g/mol Which reactant is in excess? Why it needs to have more excess reactants to drive the reaction forward?
- how would u justify this question? my answer is correct i just do not understand the justification. this is a non graded practice worksheetHi, can you check my math? Can percent error be negative, if so what does that mean and how do I explain that for my results? These are calculations for Determining the ksp of Calcium Hydroxide Lab. Thanks!for a experiment how would you calculate the mmol & Equivalents with MW= 106.42g/mol Amount Used: 42mg Density: 12.02g/mol
- There's 1 drink (and you are asked to determine the glucose concentration in the drink in the units of g/100mL. (Why these units? Well, once you have the concentrations in g/100mL you will be able to compare your values with the nutritional values given on the drink bottles’ labels). The sample of the drink was diluted 1/100 (i.e. by a factor of 100). This was an essential step in the method because, without it, the machine used to analyse the glucose concentration (spectrophotometer) would have given an error as the concentration would have been too high for accurate detection. What this means for you is that the dilution factor will need to be taken into consideration in your calculations (remember the aim is to calculate the concentration in the original drink and not in the diluted drink). You measured the concentration of their diluted drink using the spectrophotometer and their results were provided to them in the units mM (millimolar). Glucose Concentration in mM of drink =…There's 1 drink (and you are asked to determine the glucose concentration in the drink in the units of g/100mL. (Why these units? Well, once you have the concentrations in g/100mL you will be able to compare your values with the nutritional values given on the drink bottles’ labels). The sample of the drink was diluted 1/100 (i.e. by a factor of 100). This was an essential step in the method because, without it, the machine used to analyse the glucose concentration (spectrophotometer) would have given an error as the concentration would have been too high for accurate detection. What this means for you is that the dilution factor will need to be taken into consideration in your calculations (remember the aim is to calculate the concentration in the original drink and not in the diluted drink). You measured the concentration of their diluted drink using the spectrophotometer and their results were provided to them in the units mM (millimolar). Glucose Concentration in mM of drink =…State and explain one possible source of random error whilst using a pipette.Your answer should justify why this is a random error.
- A feedstuff weighing 2 g and moisture content at 5%. When estimating the crude protein, use 82 ml of HC1 (0.01 N) (Plank volume = zero). Calculate i. The percentage of crude protein base on dry matter. ii. The percentage of crude protein base on natural (fresh) material. iii. The percentage of crude protein base on organic matter, when crude ash in the feedstuff is 0.3 g.Vitamin C Analysis, a student accidentally puts 1.0 g of sodium bicarbonate (NaHCO3) solid into the vitamin sample solution for trial #1 instead of 0.5 g as the procedure instructs. How does this procedural change impact the calculated milligrams of ascorbic acid in the sample?The answer with a BCA table for both parts would be great, thank in advance for the help. btw, this is a pre test that isn’t graded