Is it possible for a single molecule to test true positive in all the qualitative assays? Why or why not?

Q: Hi, Could you summarise the Log D practical 'The Dependance of Distribution Coefficient Upon pH) -…

A: The standard solution of a solute is obtained by dissolving a calculated quantity of the solute in a…

Q: Retention Time Area of Peak % of Total Identity Component 1 Component 2 Component 3

A: Given data:

Q: Metal ions chelate polar groups of analyte molecules for longer retention time. Does this affect…

A: HPLC is based on the principle where the sample (analyte) is distributed between a mobile phase…

Q: Chromatography

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Q: Using the chromatogram shown here, which was obtained on a 2-m column, determine values for tr, w,…

A:

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: what is the best choice of detector for lorazepam in Gas chromatography

A: The best choice of detector for lorazepam in Gas chromatography is nitrogen-phosphorus…

Q: . Does the value of the equilibrium constant change when the concentration of either the reactants…

A: You have asked about part (B) only, I have to answer part (B),so, let's start. Given, Balanced…

Q: Is it possible to detect metal complexes of organic acids with thin layer chromatography?

A: Thin layer chromatography, abbreviated as TLC, is used to identify the element or compound present…

Q: A student measures the following using a crude colorimeter. Intensity of blank =206 Intensity of…

A: When the intensity of light is passed through the sample solution then some of the light is getting…

Q: Beer's law why does the procedure for measuring the concentration of a solution photometrically…

A: For the calibration of spectrophotometer blank solution is needed.

Q: In reverse phase chromatography which analyte will elute first, most polar or least polar?

A: In reverse phase chromatography, polar solvent is used as a mobile phase.

Q: The interaction between a basic analyte and the residual silanol groups of the stationary phase is…

A: When pH of mobile phase is equal to pKa of silanol then its proton will get deprotonated and basic…

Q: If you did not completely dry the Erlenmeyer flask before weighing the result, how would that affect…

A: Given : You did not completely dry the Erlenmeyer flask before weighing the result.

Q: An analyte has a Rf value of 0.5.  What does that say about the solubility   of the analyte in the…

A: As we know, Rf value is nothing but ratio of distance travelled by solute to distance travelled by…

Q: Table 1: Volumes in of iodine in mL used to titrate mixtures of 10 mL of reaction mix and 10 mL of…

A: Given :            CF = 1.06           TVS (mg/hour) = x (ml) X CF ( mg vit.C/ mL iodine ) X TV (mL/…

Q: 1. Molarity of the NaOH solution 0.238 mol/L Trial 1 Trial 2 Trial 2. Volume of H;PO4 added to flask…

A: The given problem is titration of NaOH Vs H3PO4. Given Molarity Of NaOH=0.238mol/L

Q: Assuming 2-naphtholc acid (from Question # 12) is a solid, how can you check that it is pure after…

A: The impure substance is a mixture. To check the purity of the whether after being separated is done…

Q: Which compound elutes first and last in reverse chromatography

A: In reverse phase chromatography, stationary phase is non polar and mobile phase is polar in nature.…

Q: How would i perform a serial dilution of 1/2 and 1/4 if i have 7.5mL of an unknown protein, the…

A: The molarity of a solution is the number of moles of solute in the solvent. Molarity varies with the…

Q: 2. What are mobile and Stationary phases in a chromatogram? Site their nature.

A: The solution is given below -

Q: Why are two solvent in extraction immiscible?

A: Solvent - - > The solvent are those substance in which the solute is dissolved to form solution.…

Q: What do you understand by Isocratic and Gradient elution?

A: Isocratic Elution : In the light of chromatography isocratic   elution means that the composition of…

Q: Why is the flame test used for the qualitative determination of Potassium ion and Sodium ion?

A: Flame test is used to identify a cation visually by the colour of the flame. Every element has its…

Q: Biuret Assay accurately quantify protein concentration within the range of 5-150 mg/mL. JUSTIFY THE…

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Q: In this experiment, it is assumed that No. of moles of (Ca2+ + Mg2+) = moles (Ca2+).   Calculate the…

A: Here Given that, The volume of EDTA was 25.0 mL dissolved into 250 mL. And Standard density of EDTA…

Q: If the value of the blank solution is equal to 7.0 g/cm3 while the salt concentration is 9.7 g/cm3.…

A: The Seta Salt in Crude Analyzer is a robust and portable instrument for determining the chloride…

Q: Comment on the procedural differences of the gravimetric and volumetric analysis

A:

Q: All of the following will generate reproducible but not accurate results except a. The analytical…

A: A multiple choice question based on analytical process that is to be accomplished.

Q: A compound X is to be determined by UV/visible spectrophotometry. A calibration curve is…

A: Calibration curve in Beer's law plot is drawn by taking Absorbance(A) on Y-axis and concentration(C)…

Q: How is spiking used in qualitative analysis? Why are several different types of columns necessary to…

A: The technique of Spiking the sample involves addition of a known reference substance to a sample, in…

Q: An analyte has an Rf value of 0.25. What does that indicate about the solubility of the analyte in…

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Q: Why is it best to use a small amount of standard when performing mixed melting point analysis?

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Q: How can TLC be used to determine if a sample is pure?

A: Thin Layer Chromatography (TLC) is a separation procedure that requires a very small sample. It is…

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: IC An analyte has a Rf value of 0.50, What does that indicate about the solubility of the analyte in…

A: Retention factor describes the ratio of time spent in the stationary phase relative to time spent in…

Q: In your own words, discuss the reason why stray light should be minimized. How does stray light…

A:

Q: . Which of the following compounds will elu LAST in a reverse phase chromatography? а. Br С. NH2 d.

A:

Q: "Start the chromatography by adjusting the fraction collector to 130 drops per fraction (about 3…

A: It is given that for 130 drops per fraction it shows volume 3 mL That means volume of 130 drops is 3…

Q: NPCI2) 2(NSCI) reflux Ru(PMeg)4ME2 Me2GeArH reflux Na, toluene

A: product of the following reactions given below;

Q: If the unknown well water samples were analyzed at 550 nm but the external standard solutions were…

A: Solution -

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: If 0.18 mL was used in the blank titration to achieve the same end-point color in the previous…

A: Hard water is the water sample that contains Ca2+ and Mg2+. Such water cannot be used in washing…

Q: why is it necessary to test the ph? EXTRME DETAIL PLEASE   PROCEDURE To a six inch test tube was…

A: Please find your solution below : Benzoin condensation is an addition reaction between two aldehydes…

Q: Why do brands broaden as they travel through a chromatography column ?

A: In analytical chemistry, To separate a single compound from a mixture, Column chromatography is…

Q: Calculate the concentration of stock tetraoxosulphate 6 acid which has mass density of 2.50 and has…

A: In the given question we have to calculate the stock concentration of Tetraoxosulphate(VI).

Q: I'm working on a pre-lab report for chemistry regarding retention factors. The question asks what is…

A: Retention factors are related to chromatography experiment. Retention factor is the ratio of the…

Q: An analyte has a Rf value of 1.  What does that say about the solubility of the analyte in the…

A: As we know Rf value is nothing but ratio of distance travelled by solute to distance travelled by…

Q: Match the substances to the method used in the assay Acetazolamide Benzaldehyde Chlorambucil…

A: We can generally categorise titrations as : Direct titration : The most basic method of titration…