Answered: The interaction between a basic analyte…

The interaction between a basic analyte and the residual silanol groups of the stationary phase is minimized when the pH of the mobile phase used is equal to the pKa of silanol. True or False?

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter20: Molecular Spectroscopy And Photochemistry

Section: Chapter Questions

Problem 67CP

See similar textbooks

Related questions

Q: Which is more polar? Phenol or Glucose?

A: Higher is the dipole moment higher will be the polarity.

Q: Peptide 5 Peptide 4 م م م م م ملزم

Q: Write the complete ground-state electron configuration of Li. For multi-digit superscripts or…

Q: Draw the products formed when each ester is treated with lithium hydroxide and water. Reaction A…

Q: The following mixture of solutions were prepared to study the rate of a chemical reaction (similar…

Q: Acid Base Neutralization of HCI and Ca(OH)₂. Use the volume and Molarity information in the table to…

A: Given : Volume of HCl = 505 ml Molarity of HCl = 2.01 M Volume of Ca(OH)2 = 505 ml Molarity of…

Q: For the molecule shown below, provide the names for all of the indicated functional groups: ger NH₂,…

A: We have find out the names of indicated functional groups in the given molecule.

Q: 1. What is the specific gravity of N2 * at 80°F and 745 mm Hg compared to air at 80°F and 745 mm Hg?

Q: The octahedral ion complex [CoF6] 3‒ absorbs at 675 nm. (a) What color is the complex? (b)…

Q: Вос 340 253 110 Es,N, KL, dioxane toluene, reflus, 57% DMF-DMA, DMF, 110 "C 83% from 337 O NH 254…

A: In the above question some of organic reactions are given.

Q: Given the parent compound, draw the mass spectrum fragment that is observed at m/z 91. Include any…

A: Mass spectrometry measures the mass of the compound and its fragments in the form of a cation. The…

Q: Scholarship Ap X Report - Googl X NGLSync Portal X OWLv2 | Online X +…

Q: It is useful to define the spin angular momentum ladder operators or shift operators St=S, +iS, and…

A: Here we are required to prove the following relation

Q: Given the equation below: How many grams of aluminum oxide will be produced by the decomposition of…

A: Dear student , since you have posted multiple questions we will allow to solve only first question…

Q: Which of the following correctly explains why car tires may appear more deflated in winter than in…

A: Tiers seems to deflated more in cold days.

Q: 4. Which of the following formulations will give the highest ATP yield upon complete oxidation? Show…

A: Formulation A sucrose= 24 pyruvate= 15 oxaloacetate= 14

Q: +X Describe the atomic orbital shown in this picture. +Z A) 2pz B) 2py C) 2px D) 3px E) 3py +y

Q: 2. Liquid oxygen is used in the steel industry, in the chemical industry, in hospitals, as rocket…

A: Pressure in Tank exceed the safety limit.

Q: Given the data in the table below, AH, for the reaction rxn IF5 (g) + F2 (g) → IF7 (g) AHᵒf…

A: The standard enthalpy of formation is the enthalpy change of reaction in standard conditions when…

Q: OH xohn POCI3, pyridine HBr, heat OH OH H₂SO4, heat 1) NaH 2) Ph Br

Q: A piece of parmesan cheese is burned in a soda can calorimeter, and heats up 0.235 kg of water by…

Q: Fractional distillation lab What is the purpose of distillation? What is the theory of fractional…

A: According to bartleby guidelines we're supposed to answer first three subparts of a multipart…

Q: H C C. 'N' Н С NH₂ OH CH₂ CH₂ 2x Eto

A: Here we have to write the mechanism and products formed in the following given reactions. Here the…

Q: Use the chemical equation to find the answers. H2CO3 → H2O + CO2 Identify how many oxygen atoms…

Q: Potassium iodate, KIO3, was prepared by dissolving 2.023 g of KIO3 in a 500 mL volumetric flask. A…

Q: Copper(II) sulfate solution is used to etch designs on copper jewellery. Calculate the volume in L…

Q: In a pure sample CH₂F₂, what forces of attraction exists between molecules? A) dispersion forces…

Q: Concentration sodium thiosulfate solution used: 0.056 mol L-1 ACCURATE TITRATION VOLUME OF SODIUM…

Q: Construct a simulated 'H NMR spectrum for the given structural formula. Drag the appropriate…

A: The concept used in this problem is based on Nuclear magnetic resonance \left( {^{\rm{1}}{\rm{H…

Q: The pH of an aqueous solution of 0.569 M quinoline (a weak base with the formula CoH7N) is Submit…

Q: ** Directions Match the items in column A with those in column B. Write the letter of each correct…

Q: An electrolytic cell is constructed using platinum electrodes in an aqueous NaHCO3 solution. The…

Q: H NaBH4 (excess) MeOH он он 0= H+

A: We have to draw the mechanism of the given reaction.

Q: Given three acids, HCl, HBr, and HI, HCl exhibits the strongest dipole-dipole force of attraction…

Q: Q1. What are the similarities in the chemical structure of the compounds? Are the compounds made up…

A: Answer 1. Glycerol - Mostly known as glycerine is a poly-alcohol compound that is colorless,…

Q: A simple (i.e. single equilibrium stage) batch still is being used to separate benzene from…

Q: The following reaction has an equilibrium constant 1.0 x 10-15 at high temperatures 2HF(g) ⇌H2(g)…

A: Given the equilibrium constant, Keq = 1.0 x 10-15 . Here Keq = 1.0 x 10-15 << 1

Q: functional grp analysis compound: myristic acid pls complete the table Test Reagent Observation…

Q: Reorder the list in the table, if necessary, so that the atoms and ions in it are list in order of…

Q: Write the expression for Kc for the reaction Fe₂S3(s) ⇒ 2 Fe3+ + 3 S² (aq) (aq) Kc = [2Fe³+1²…

Q: Consider the reaction Ca(OH)2 (s)→CaO(s) + H₂O(1) with enthalpy of reaction AHrxn = 65.2kJ/mol What…

Q: Which of the following units are used to measure heat? Select all that apply. Kelvin Celsius…

A: Heat is a type of energy and the heat of a system can be measured by measuring the temperature of…

Q: Given the molecular formula and ¹³C NMR data (in ppm), deduce and draw the structure of the unknown…

Q: Silicon having a melting point of 1412°C forms an alloy with aluminum having a melting point of…

A: Please find the below attachments. Please rate........ Thank you.

Q: Absorption in the I region can give the following information EXCEPT O type of functional group(s)…

Q: The hydronium ion concentration of an aqueous solution of 0.422 M diethylamine (a weak base with the…

Q: Draw and explain the cyclic voltammogram of [Pt (p-tap) (tb cat)] in CH3CN at Pt disk electrode,…

Q: 2.3 7 (a) Describe what happens when each of the following molecules is separately dissolved in…

A: Acid can be defined as the substance that give hydrogen ions in aqueous solution and base is a…

Q: Among the following compounds: CH3CH2OH, CH3OCH3, and CH3CH2CH3, which will have the lowest boiling…

Q: A reaction A(aq) + B(aq) = C(aq) has a standard free-energy change of -4.76 kJ/mol at 25 °C. What…

Question

The interaction between a basic analyte and the residual silanol groups of the stationary phase is minimized when the pH of the mobile phase used is equal to the pKa of silanol. True or False?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

25.0 cm3 of sodium hydroxide solution is tritrated against 0.2 mol dm–3 hydrochloric acid until the indicator just changes colour. 27.5 cm3 of the acid are required to reach the end point.Phenolphthalein is used as an indicator in the above experiment. What will be its colour change at the end point? From pink to yellow From pink to colourless From yellow to colourless From yellow to pink
4. The molar absorptivities of the indicator weak acid HIn (K₁ = 1.42 x 105) and its conjugate base In at 570 were determined as ε(HIn) = 7120 and ɛ(In) = 961. The optical length b = 1.00 cm. (a) What is the absorbance of an unbuffered indicator solution having total indicator concentration 8.0 × 10%. (b) What is the absorbance of a buffered indicator solution having total indicator concentration 8.0 x 105 and pH = 6.5.
A weak acid (HA) with a pKa of 4.0 has a distribution constant of 5.2 between an organic and aqueous phase. Calculate the fraction of HA in the organic phase at pH 2 and 6 when HA is extracted from 50 mL of aqueous buffer into 10 mL of the organic solvent.
A.) The value of Ka for hydrocyanic acid is 4.00×10-10.What is the value of Kb, for its conjugate base, CN-? B.) In the laboratory, a general chemistry student measured the pH of a 0.589 M aqueous solution of benzoic acid, C6H5COOH to be 2.199.Use the information she obtained to determine the Ka for this acid.Ka(experiment) =
Show that the equivalence point N1V1=N2V2 where V1mL of analyte of strength N1 reacts with V2L of o titrant of strength N2?
1. Will a 5% preparation of caffeine citrate compounded in citrate buffer, pH 4.8 with no additional co-solvents be a solution – Yes or No? Explain. The MW of caffeine is 194.19 Da and that of caffeine citrate is 386.3 Da. The intrinsic solubility of caffeine is 2.17g/100 mL. please explain the answer.
What is the pH of a very dilute solution of a .5 x 10-7 M NaOH solution. Do not take into account Activity Coefficients
What would be the learning objective in an experiment of the determination of the Ksp of a slightly soluble compound?
The standardization of same titrant during the determination of BOD5 of water sample was done separately for Day 1 and Day 5. Upon standardization, it turned out that the concentration of the titrant in Day 1 is higher than the concentration of the same batch of titrant in Day 5. How would you explain this discrepancy? (A) There were bubbles at the tip of the burette during titration. (B) Too much starch indicator was added in the conical flask. Sulfuric acid was added first before potassium iodide. (D) The water used to prepare the Na₂S₂O3 solution was not boiled resulting to proliferation of bacteria.
Sketch a plot of the fraction of species, f, vs pH for Tyr. Show your calculations for several points on the plot. You want to calculate the fraction of the species for more than 3 of the points. pKa’s for Tyr is 2.24, 9.04, and 10.10.
To perform a certain activity assay it is necessary to have 0.25 mL of an enzyme at a concentration of 0.2 mgmL-1 in the presence of 0.4 mM substrate and 200 mM NaCl in a suitable buffer. The stock solutions of enzyme, substrate and NaCl are 4 mgmL-1, 40 mM and 1 M, all in the same type of buffer. What volumes of the stock solutions and buffer are required for each assay?
Calculate the pH of a buffer solution containing 10.0 cm3 of 0.100 mol dm–3 NaOH and 20.0 cm3 of 0.500 mol dm–3 ethanoic (acetic) acid made up to a total of 50.0 cm3 in a volumetric flask at 298 K. The pKa of ethanoic acid at 298 K is 4.77