Q: 1. The dissociation of arsenic acid is given by: H3ASO4(aq) + H₂O(1) H₂ASO4 (aq) + H₂O(1) H₂ASO4…
A: #1: Arsenic acid, H3AsO4(aq) is a triprotic acid that can donate up to 3 protons. The Ka values…
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A: Equilibrium constant Kc can be found out using ICE table.
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A: Precipitate is formed when one of the products is sparingly soluble in water.
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Q: Enough of a monoprotic weak acid is dissolved in water to produce a 0.0104 M solution. The pH of the…
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A: Given,Moles of lithium = 0.126 moleRequired, Weight of lithium .
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A: Dear student , since you have posted multiple questions we are allowed to solve only first…
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Q: Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free…
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Q: * TRANSMITTANCE 100- 68- 20 SAMPLE 4000 3000 2500 HAVENUMBERS 2000 1500
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Q: Name fag CH4 1 Carbon + 4 Hydrogen Covalent
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Q: from one of our neigboring countries are heavily contaminated with pesticides. Upon analysis, some…
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Q: Which of the following structures is the most stable configuration of 1-ethyl-2-methylcyclohexane?…
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Q: A 0.10 mol/L solution of ammoia, NH3(aq) has a pOH of 2.89 at a certain Determine K₁ for ammonia at…
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Q: .300.0 mL of 0.00325 mol/L barium chloride is added to an equal volume of 0.004 00 mol/L sodium…
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Q: What is the major product of the following reaction? A. B. C. C. D. HBr heat OH Br Br Br Br Br Br OH
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Q: Which of the following has the highest total number of atoms? Select one: a.2.6 moles of Ca(OH)2…
A: 1 mol = 6.022 × 1023 atoms
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States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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- Two group of students wish to analyse caffeine content in tea samples. Group 1 performed the analysis using thin layer chromatography. Group 2 wish to conduct the analysis using analytical instrumentation. Suggest a possible analytical instrument method for Group 2.Briefly explain the procedural steps before instrumentation. List another two applications of this instrument.A solution containing orange rind extract was analyzed using gas chromatography to measure its limonene content. The parameters used to analyze the standards and samples are listed below. Calculate the concentration of limonene in the solution in ug/mLIman has a mixture of two compounds A and B. A is a protein, and B is a lipid. He plans to separate the mixture using a column chromatography technique. He packed the column with amino bonded with siloxane material and use a mixture of 20:80 of water: hexane as the mobile phase. i) Sketch the apparatus set up for the chromatographic technique used by Iman. Use the correct chromatographic terminologies to label all of the apparatus, materials, and phases. ii) Predict the sequence of elution when the mixture was loaded onto the separation column. Justify your answer. iii) After the first compound was eluted, Iman discovered that the second compound was taking too long to pass through the column. Please suggest any strategies that could be used to aid the elution process.
- 4) If the classification of the chromatography run is a reverse-phase chromatography, discuss the relative polarities of caffeine, aspartame and benzoate.5) Given the data of the diet sodas, which one would you recommend to be the healthiest? (You may need to research the functions of caffeine, aspartame and benzoate. Please add references if necessary.)Which of the following statement is false? a. Component with the strong attraction to the support move more slowly than component with weak attraction. b. Chromatography technique used to separate only colored compounds. c. On TLC, single spot does not mean or guarantee a single substance (compound). d. Iodine vapor and UV- lamp are methods used for visualization uncolored compounds.2.3 In an experiment the essential oils from herbs, were extracted with water. Explain how you will separate the oils from the water using liquid-liquid extraction. Discuss the procedure, equipment and extraction solvent choice.
- Separation of Amino Acids by Thin Layer Chromatography Lab Questions. Thank you for your help on these questions!What further testing should be done to extract and compare the composition of food dyes used In two types of candies.(except in paper chromatography)A sample of fried potatoes weighing 200 g was extracted using a volatile organicsolvent. The recovered cooking oil weighed 15 g. What methods from thisexperiment could be used to separate the cooking oil after the extraction? (evaporation, gravity filtration or vacuum filtration?) why so?
- In a chromatographic analysis, it was found out that distance travelled by the alcohol solvent is 4 cm away from the finish line. The distance travelled from the starting line to finish line is 40 cm. The first amino acid, AA1 travelled 6 cm behind the distance travelled by the alcohol. The second amino acid, AA2 travelled 12 cm short from the solvent front while the third amino acid, AA3 travelled 8 cm ahead of AA2. Calculate: Rf of AA1 ____ Rf of AA2____ Rf of AA3____ (Rf= Retention factor)An enzymatic method for determining alcohol in the wine is evaluated by comparison with a gas-chromatography (GC) method. The same sample is analyzed several times by both methods with the following results (% ethanol). The values of alcohol for both enzymatic and GC methods are shown in Table 1. Using a suitable test, determine whether the enzymatic method gives the same value as the GC method at 95% confidence level.Upon screening with TLC (made of silica gel) chromatography using hexane/chloroform (3:1) as eluting solution, 3 spots were detected corresponding to a (A) polyphenol, a (B) tannin and an (C) alkaloid. Write the letters of your answers on the spots in the chromatogram shown at the right.