Q: 1. What is the gravimetric factor involved? 2. What is the percentage weight of the analyte in…
A: Here, substance sought : Cl- Substance weighed : AgCl
Q: Why is it important that the chemical used as the primary standard is non- hygroscopic and pure? Why…
A: Given statements, It is important that the chemical used as the primary standard is non-…
Q: A student properly sets up a column chromatography experiment. Although the mixture is soluble in…
A: Column chromatography is used to separate or purify different materials.This colomn chromatography…
Q: The obtained plot in the detector of HPLC is called, O peak O bell O triangle area
A: HPLC stands for high performance liquid chromatography which is a separation technique and the…
Q: How does it affect the peak produced in gas chromatography when: – Inserting samples is too slow –…
A: ✓Chromatography is a technique that separates components in a mixture by the difference in…
Q: Why is it necessary to cover the developing chamber tightly during the development of a…
A: Given : Development of chromatogram To find: Reason for tightly packed developing chamber during…
Q: Briefly explain why internal standardization method is useful in analytical chemistry?
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: What is the percentage weight of the chloride ions in trial 1? What is the percentage weight of the…
A: Analysis of a sample
Q: In your own words, discuss the reason why stray light should be minimized. How does stray light…
A: Stray light is defined as the light whose wavelengths lies outside the monochromator range. Stray…
Q: Relative Standard Deviation of UV Vis, please explain.
A: A question based on RSD, which is to be accomplished.
Q: confirmation ▪ True or false: The purpose of the internal standard is to make quantitation of the…
A: Internal standard is added blank as well as sample to determine the concentration of analyte.
Q: calculate the following for each sample gas chromatograph. a) retention time for each peak (label…
A: The given plot is redrawn as shown below.
Q: Identify two (2) unwanted sources of heat loss and/or gain that may have contributed to the error in…
A: In calorimetry it is assumed that the whole amount of heat energy being released by the hot body is…
Q: In a thin layer chromatography experiment, a plate of length 8.67 cm was used and a horizontal line…
A: Retention factor (Rf) is defined as the ratio of the distance travelled by the compound (dc) to the…
Q: Write the names of four main GC detectors (titles only). Which one of these detectors is used on its…
A: A question about GC detector, which is to be accomplished.
Q: . Describe volumetric quantitative analytical methods.
A: In chemistry, there are many ways to check the deviation of experimental data from the accurate…
Q: Which of the following is NOT a possible cause of error when taking a spectrophotometer reading? An…
A: Spectrophotometer is used to measure absorption if light or the amount of chemicals in a solution.…
Q: a.) What is the linear equation for the calibration plot? b.) What is the amount of sulfate in the…
A: A question based on analytical process, which is to be accomplished.
Q: What is the difference between Mohr and serological pipette?
A: Difference between Mohr and serological pipette is given below.
Q: Is standardization against primary standard required for controlled potential coulometry ?
A: Controlled potential coulometry, as the name suggests, is a coulometry method that measures the…
Q: What is the difference between isocratic and gradient elution?
A:
Q: This is the graph for gel filtration chromatography. Can you please explain why the graph has the…
A: Gel filtration chromatography is a variant of size exclusion chromatography that can be employed to…
Q: Investigate the linear calibration range of this experiment.
A: Lead Concentration, ng ml-1 Absorbance 10 0.05 25 0.17 50 0.32 100 0.6 200 1.07…
Q: A neutral compound has a partition coefficient of 7 between ether and water. What percentage of the…
A: Partition coefficient (K) = Kether/ Kwater = 7 Let initial amount f substance = W gram After…
Q: Why do we use a makeup gas for some gas chromatography detectors?
A: The method of separation of components present in the mixture is termed as chromatography.…
Q: Why should the syringe be removed from the sensor when setting the initial volume for each trial?
A: Option C
Q: The label is a reagent to which he had specified on the label only the alcohol name and molecular…
A: A question based on NMR spectroscopy that is to be accomplished.
Q: Detector response is corrected to take in account dilution before being plotted on the y-axis. O…
A: True
Q: What procedures should be done to guarantee that the calibration curve is accurate?
A:
Q: A HPLC column had a sample (0.10ml) loaded onto it. The detector volume showed 0.15 mL. From this…
A: Before starting any troubleshooting, whether it is related to instruments or columns, it isessential…
Q: Separation of Peaks Below are two chromatograms after LC separation. Which chromatogram is better to…
A: LCMS is Liquid chromatography–mass spectrometry which is used for mass analysis of unknown or known…
Q: Consider the chromatogram that t3=20 sec, calculate for its number of theoretical plates: " 12 Ty…
A: Here we are required to find the number of theoretical plates
Q: what can be an analyte for using internal standard? sample: vegetable oil containing ethyl oleate,…
A: In the analytical techniques, such as gas chromatography or HPLC, standardization of the sample…
Q: 1.0 g of a compound A is prepared in 100 mL of water, and then extracted with 50 mL of ether. After…
A: Initially 1 g of compound A was present in the water. And finally the ether is extracting 0.25 g of…
Q: why is it important to apply the percent volume and percent retrieval in separation of mixtures…
A:
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: to the kit manual 200uL of plasma was mixed with 2.8 ml of the dilution buffer, mixed well then 200…
A: Solution:- The sample's final concentration would be 15.
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A: Find the complete solution given below
Q: If it was discovered that a polyaromatic hydrocarbon (PAH) having a density of 1 g/cm3 has a…
A:
Q: What is the Rf of the compound if the compound distance is 2.59 cm and the solvent front distance is…
A: Given that, Distance travelled by solute= 2.59 cm Distance travelled by solvent= 5.81 cm Then ,…
Q: DATA FROM RECRYSTALLIZATION EXPERIMENT Weight of crude benzoic acid, g 0.2498 Weight of filter…
A:
Q: Categorize each as a determinate or an indeterminate error and further classify determinate errors…
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: What are the mechanisms of samples separation work in Thin layer Chromatography? Please shortly…
A: TLC
Q: Does the amount of radiation (cpm) increase or decrease as the distance between the sorce and the…
A: Amount of radiation between the source and sensor is determine using the inverse square formula:…
Q: 100 80 60 40 20 % of base peak 30 L 40 80 M**# 103 120 160 m/e 200 Mass Spectrum C4H₂NO₂ 280 240
A: In the given problem we need to speculate and explain the major peak found in the mass speactra of a…
Q: Please describe possible sources of error in HPLC experiments - systematic and random and how they…
A: HPLC(High performance liquid chromatography) Errors in HPLC can be systematic and random. Systematic…
Q: Purpose of quantitative transfer in experiments.
A: The dissolution of a solute in a solvent based on its solubility rule provides a solution. If the…
Q: Using the Chromatographs containing the unknown mixture of Acetates and the corresponding relative…
A:
Q: 4. Why is it so important that you don't erase mistakes on the chromatography раper?
A: Given : Chromatography paper To Find: Reason for not erasing mistakes on chromatography paper…
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- Explain the significance of gravimetric analysis? Give a specific example by enumerating the steps of the analysis.Is their a true chemistry defeinition of what "percent by volume means?" If so, can it be described as this definition: Volume/volume percentage (v/v percent) is a measure of the concentration of a substance in a solution. It is expressed as the ratio of the volume of the solute to the total volume of the solution multiplied by 100.1. A group of students from the instrumental analysis laboratory of the course analyzed the sodium content in a serum sample using ICP-OES. They used 5 flasks with 25 mL of sample serum in each and added different amounts of a standard 2.640MNaCl solution to a total volume of 50 mL . Calculate: a. Equation for calibration b. Serum sodium concentration
- In lab, you add 2.074 g salicylic acid to a 125 mL Erlenmeyer flask, as listed in the procedure. You carefully add 4.0 mL acetic anhydride and have your TA add 5 drops of sulfuric acid. After completing the synthesis and filtering, you place the crystals to dry on an evaporating dish that weights 21.682 g. After drying, the crystals and evaporating dish weigh 23.034. Calculate the percent yield of aspirin.BSA for concentration measurements is often prepared as a 10 mg/mL stock solution. Suppose you wish to prepare a series of 10 mL solutions of BSA at 1.0, 0.8, 0.6, 0.4, and 0.2 mg/mL. Using the dilution equation C1 × V1 = C2 × V2, you plan to do this by transferring a calculated volume (V1) of the 10 mg/mL (C1) into a clean test tube, then adding water in sufficient volume to produce 10 mL (V2) at the desired concentration (C2). Complete the table below, showing the volume of stock 10 mg/mL solution you need to add to each tube, and the volume of water you need to add to each. Also, convert the desired mg/mL concentration values to their equivalent in μM (micromolar; 10-6 M).For the analysis of unknown soda and vinegar samples, 25.0 mL soda and 1.0 mL vinegar samples were diluted to 50.0 mL in separate Erlenmeyer flasks. KHP, 0.85 g, (Purity = 99.98%; Molar mass = 204.22 g/mol) was titrated with 11.5 mL of NaOH. After the standardization step, it required 0.0143 L of NaOH to reach the endpoint with the soda sample while it took 0.00885 L with the vinegar sample. Phenolphthalein was used as the indicator for the experiment. Express all final answers in 2 significant figures. a. Determine the concentration of the titrant (NaOH) b. Determine the concentration of the unknown vinegar sample. c. Determine the concentration of the unknown soda sample.
- In an impure sample of table salt that weighed 0.8421 g when dissolved in water and treated with excess AgN03 formed 2.044 g of AgCl. Listing the percentage of NaCl is in the impure sample. What is the list of three sources of error in this experiment?An empty beaker weighs 45.786, beaker with mixture of sulfate weighed 64.861. Then a preweighed watch glass 17.876 g, watch glass with dried Fe(SO4)3 weighed 39.258. Find the % of sulfate mixture?KHP (aq)+NaOH (aq)-->NaKHP (aq)+H2O(l) Trial Vi (mL) Vf (mL) 1 36.19 48.56 2 3 A student masses out 1.096 grams of KHP, which is dissolved in 25.00 mL of DI water. This KHP solution is titrated with NaOH, as shown in the equation above. Calculate the molarity of the NaOH solution.
- A 1.000-g sample of a sweetening agent containing soluble Saccharin (MM=205.17g/mol) was analyzed using the Volhard method as follows: Step 1: Sample was dissolved in distilled water and treated with 10.0 mL of 0.05M AgNO3. Saccharin-Na + Ag+ → Saccharin-Ag (s) + Na+ Step 2: The solid, Saccharin-Ag (s), formed was filtered off and washed with water. The filtrate and washing were collected quantitatively. Step 3: Titration of the filtrate and washings required 4.6 mL of 0.04M KSCN. KSCN + Ag + → AgSCN (s) + K+ Calculate weight % saccharin in the sweetening agent sample. could you type it out, pleaseOne of the reactions in the Solvay Process involves the reaction of calcium oxide with water toproduce slaked lime (calcium hydroxide).CaO(s) + H O2 (l) - Ca(OH)2 (s)A lab technician performs the experiment and uses 54.8 g of calcium oxide to react with a setamount of water. When the reaction is completed, the technician uses a filtration apparatus tocollect the mass of calcium hydroxide produced. The following data is recorded:Mass of filter paper: 1.24 gMass of filter paper and solid: 68.04 g What is the theoretical mass of calcium hydroxide that is predicted to be produced? What mass of precipitate was collected in this experiment? What is the percent error? Comment on the validity of the resultsWhen Na3PO4 and Ca(NO3)2 are combined , the following reactions occurs:2PO4 3- (aq) + 3 Ca2+ (aq) ------ Ca3PO4)2How many grams of Ca3(PO4)2 (MM = 310.18 g/mol) are obtained from 15.00 ml of 0.1386 M Na3PO4 are mixed with 20.00 ml of 0.2118 M Ca(NO3)2 ?