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: How glass electrode can be modified to measure sodium in analyte.
A: The glass membranes in glass electrodes are designed to allow partial penetration by the analyte…
Q: Why was it important that you marked the origin line and component locations on the paper…
A: Pencil is made up of either graphite or lead and it does not have any interaction with the mobile…
Q: Define the terms theoretical plate, plate height, and number of plates in chromatography. Discuss…
A: Theoretical plates: Theoretical plates represent a hypothetical division of chromatographic columns,…
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: Which solution is of known concentration that is used to react completely with an analyte?…
A:
Q: The height of three peaks; A, B, and C obtained in a gas chromatogram are 20.6 mm, 17.5 mm and 40.6…
A: A numerical problem based on gas chromatography, which is to be accomplished.
Q: What would be the effect of collecting larger fractions when carrying out an experiment?
A: Column chromatography : it is an analytical method for separating a mixture of liquid-liquid ,…
Q: Why must a dry container be handled with tongs or finger pads when taking its weight using…
A: Given that a dry container be handled with tongs or finger pads when taking itsweight
Q: In a similar experiment, the mass of 3 PB tablets was measured to be 3.1177 g. The tablets were…
A:
Q: what is the difference between liquid phase extraction and solid phase extraction
A: A question based on analytical process that is to be accomplished.
Q: Why line extraction from a point cloud is needed ?
A: Planar structure extraction from point clouds is an important process in many applications.
Q: Explain why there was no solid material remaining after heating the ammonium carbonate in this…
A: We are heating ammonium carbonate in this experiment. The chemical formula of ammonium carbonate is…
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: Thomas obtained a chromatogram for hydrocarbon analysis as below. He anticipated that his setting…
A: The main problem with this spectrum is that the peaks of the components are two closely located and…
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: why is a high supporting electrolyte concentration used in most electroanalytical procedures?
A: High supporting electrolyte concentration used in most electroanalytical procedures because:…
Q: 4. The reflux set-up in the experiment allows prolonged heating of the liquid reactants for them to…
A: In organic chemistry experiment, reflux technique is used used to obtain the product in chemical…
Q: Why is it necessary to determine the nature of sample (e.g. type of analyte/sample) before…
A: Answer - Preparation is a very important step in most analytical techniques, because the techniques…
Q: Why do we need to add sand on top of the silica in column chromatography? What could happen if we…
A: The presence of different compounds in the mixture is separated by employing the separation methods.…
Q: What do you call the type of analytical method that relies on the absolute stoichiometric…
A: There are several analytical methods are used to determine the concentration of analytes .
Q: a. Which type of chromatography based on the polarity of the stationary phase was employed in the…
A: "Since there are multiple sub-parts in this question and it is not mentioned that which one has to…
Q: If water contaminated the sample after it was weighed out, what effect (higher, lower, or none)…
A: The process by which a pure substance is made impure by the addition or due to the presence of a…
Q: list the four most common reagents for open-vessel decomposition of inorganic analytical samples
A: We have to list the four most common reagents which are used in open - vessel decomposition of…
Q: Why is it important to use volatile solvent with an ESI source?
A: Volatile solvents are liquids that vaporize at room temperature. These organic solvents can be…
Q: How analytes are recovered from SFC and SFE
A: SFE is supercritical fluid extraction, in which components in a mixture are separated from each…
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: How are analytes usually recovered after SFC or SFE?
A: Step 1 of 1 SFE is supercritical fluid extraction, in which components in a mixture are…
Q: A student doing this experiment had some problems with the procedure, as described below. Explain…
A: On reaction of magnesium and hydrochloric acid, magnesium chloride and hydrogen gas is produced. The…
Q: A 2.0 g of MgCO3 was dissolved and diluted to exactly 500-mL volumetric flask. If 50-mL aliquot was…
A: Mass of MgCO3 = 2g Mol. Mass of MgCO3 = 84g/mol Volume of dilution = 500ml Volume of aliquot = 50ml…
Q: Why is it necessary to recrystallize the alum and to perform it in a well ventilated area?
A: It is method in which Non volatile organic solid can be purify, this process is also used in…
Q: Compare between open tabular column and packed columns in gas chromatography?
A: Gas chromatography is a technique which involves the sample being vaporized and then injected into…
Q: The reagent that is used in the preparation the sample and does not contain the analyte is called
A: The reagent blank is a solution that contains all the same components as in sample solution but no…
Q: Why do we not need "spitless" injection to measure the toluene content of gasoline using gas…
A: Given : Splitless injection. To find : Reason for using Splitless injection in gas chromatography.…
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: How would the following procedural error affect the experimental results? Briefly explain. When the…
A: When the final mass was determined, there was water on the foil and outside of the flask the way in…
Q: Why should the syringe be removed from the sensor when setting the initial volume for each trial?
A: Option C
Q: is mobile phase the eluting solvent?
A:
Q: 1. The properties that must be possessed by the adsorption reagent in air sampling are… a. Reagents…
A: Air sampling is the process by which the type and quantity of airborne contaminants present in an…
Q: At the completion of the experiment, a student measures the solvent front to be 55 mm from the…
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Q: What is the cause of the test tube drifting towards the side of the beaker in the liquid density…
A: Describe the liquid density experiment.
Q: In your own words, discuss the reason why stray light should be minimized. How does stray light…
A:
Q: why is it important to apply the percent volume and percent retrieval in separation of mixtures…
A:
Q: 5. In the diagram on the right, the peaks taken from the detector for X and Y compounds are shown by…
A: Spectroscopy is an analytical technique which is used o find the concentration, properties of the…
Q: pound on the accuracy of detection of a particular analyte?
A: Accuracy is measured by spiking the sample matrix of interest with a known concentration of analyte…
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: different laboratory with a cooler temperature. III. A shorter equilibration time prior to…
A: From ideal gas equation: We know ρv=ngas RT Where ρ=pressure v=Volume R=Universal Gas constant…
Q: Which of the following is TRUE regarding instrumental methods of analysis? A. these methods have…
A:
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Solved in 3 steps
- What are the types of gravimetric methods? Give an examples where each method is used in an analysis. What is particulate gravimetry? When do we use this technique?5. Why is decantation rather than filtration the preferred method of separating the salt from the mixture? 12:03 AMhow to use Gas Chromatography in Cosmetics Provide a procedure on how to do this example that you provided. Explain the procedure and what data would you gather?
- 6. Explain the reason why a laboratory analyst should not return excess or unused chemicals back in their respective reagent bottles.5. Which tablet size and the liquid combination resulted in the fastest dissolution times? A. crushed, room temperature water B. crushed, hot water C. crushed, room temperature vinegar D. broken, hot water E. broken, room temperature vinegar 6. What is the relationship between particle size and the time it takes for the tablet to dissolve? A. direct proportion B. inverse proportion C. combined proportion D. joint proportion 7. Using the activity as a model, how does mechanical weathering (breaking or crushing) contribute to chemical weathering (dissolution)? A. Increases size of particles B. Decreases dissolution time C. Increases surface area D. Both A and B E. Both B and CA 2.0 g of MgCO3 was dissolved and diluted to exactly 500-mL volumetric flask. If 50-mL aliquot was used in the analysis, what is the weight of MgCO3 present in the aliquot sample
- 4. A fat sample with combination of acids contain standard hydrochloric acid for blank and sample with 8mL and 5mL respectively. The normality of the standard hydrochloric acid is 0.93N and the weight of the sample is 3 grams. Calculate the saponification value.Which method of analysis generally is the faster method, gravimetric or volumetric? Why is that?1. In this method, the mass of the analyte or a compound derived from the analyte is determined. 2. Spectroscopic methods of analyses measure the interaction between, analyte atoms, molecules, or emission of radiation by analytes. 3. and samples are materials where its constituent parts can be distinguished visually or with the aid of a microscope. 4. These types of samples must be contained in closed containers to avoid its evaporation and change in concentration. 5. The indicated name. is a process of determining how much a given sample is the material by its 6. The components in a sample aside from the analyte that affects the final measurement are called 7. Techniques or reactions that apply to a few analytes are said to be usually requires a large investment of time 8. An analytical method with high and money. 9. This is a process of collecting a small mass of a material whose composition accurately represent the population. 10. The ultimate objective in a chemical analysis is to…
- You were tasked to separate the components of a mixture containing silica, sodium chloride and charcoal. TNāCI dissolves in water while silica and charcoal are not water-soluble. Only charcoal dissolves in carbon disulfide. a. Write a short experimental procedure to carry out the separation of the mixture. b. Given the following data, determine the percentage of charcoal, sodium chloride and silica. Mass (g) Mass of beaker 100.000 Mass of beaker + mixture 110.000 mass of evaporating dish 62.000 mass of evaporating dish + solid after evaporation of water 65.000 Mass of beaker + charcoal + silica after evaporation of excess water 117.000 mass of beaker + silica after decanting dissolved charcoal and drying 113.545A student determined fluoride in a toothpaste sample using ion chromatography. A toothpaste sample of mass 0.100 g was dissolved in type I water and then quantitatively filtered through a Whatman #1 filter paper into a clean 100 ml volumetric flask. The flask was then made up to volume with type I water and mixed thoroughly.A portion of the solution was filtered through a 0.45 um filter into a sample vial for analysis. Analysis of the sample gave a fluoride concentration of 1.60 mg/l Calculate the % w/w fluoride in the original toothpaste sample. (Give your answer to 3 decimal places please)6. Explain the reason why a laboratory analyst should not return excess or unused chemicals back in their respective reagent bottles. 7. What do you mean by "aliquot" and "dilution"?
