Q: 3. The following analyses were performed for a water sample at 25 C pH [Ca Total alkalinity Total…
A: We have find out the Langelier Saturation Index for this water and also find out this water has the…
Q: 1-There are many opportunities during a recrystallization to lose crystals. How could you improve…
A: Since you have posted multiple questions, we are solving only first question for you. If you want…
Q: Retention time Substance(s) Peak area (%) (min) Crude product Pure product 8.725 1,2-cyclohexanediol…
A: In the analysis of gas chromatography, the evaluation of peak area is one of the most important…
Q: 30) The separation efficiency of capillary columns over packed columns 31) The most common mobile…
A: Ans. (30) The separation efficiency of capillary columns over packed columns in GC is attributable…
Q: Coprecipitation that involves foreign particles? a. Inclusion b. Mechanical entrapment c. Surface…
A: Co-precipitation :– The concurrent precipitation of more than one compound from an solution.…
Q: A 100 mL of 0.125 M CH₂COOH solution was shaken with 1.2 g charcoal for 5 min. After filtration, 10…
A: I have given a detailed solution for the problem as follows:
Q: 7.7 Separation of Two Solutes Having Linear Equilibrium Two solutes have a linear equilibrium with…
A: The effective velocity of solute: u=vε+1-εK The superficial velocity is given by: v=ratearea=rAπr2
Q: Pls compute how to prepare the following solutions: 1. 500.0 mL 0.1000 M stock EDTA solution a.…
A: The procedure to prepare the solutions is already provided. The amount of each of the substances to…
Q: Match the terms with their definitions: 1. Adsorption chromatography 2. Partition chromatography 3.…
A:
Q: A student wanted to determine the percentage of sulfate in Q07. seven different unknown solid…
A: Given: Concentration of barium chloride=0.05 M
Q: Chromate-dichromate system 1. Prepare a clean spot plate and label four wells. Place 5 drops of 0.…
A: In a reversible reaction, the reaction takes place in forward direction as well as reverse direction…
Q: Using this table for the standard durve of cobalt (II) solution in UV Vis Molarity (M) Absorbance…
A: Given data L=10 cm we know that Beer Law is Absorbance=ε×M×Lwhere : M=Molarity , L=Length ,…
Q: 6. If more polar impurities are desired to be eluted first and then analyte, then at which stage do…
A: 6. If more polar impurities are desired to be eluted first and then analyte, then at step (c) i.e.…
Q: Chemistry Calculating Percent Yield 0.75g of 3-nitrobenzuldehyde(mw=151.1) is mixed with…
A: Given the mass of 3-nitrobenzaldehyde (MW = 151.1 g/mol) = 0.75 g Volume of acetophenone (MW =…
Q: igh-performance liquid chromatography would never be applied in drug analysis This statement is…
A: Given : We have to tell whether the statement is true or false.
Q: Which of the satements below is/are limitations of Dumas Method? The Ideal condition is just an…
A: The statements given are,
Q: Melting point: 122-123 experimental product melting point: 120 mass of starting material: 1.04…
A: A numerical problem based on yield, which is to be accomplished.
Q: Discuss why synthetic lubricants is preferred over petroleum-based fluids for specific applications.…
A: There are many Advantages of synthetic lubricants over petroleum based fluids.
Q: What should you do if there are insoluble impurities after heating up your sample in the…
A: A multiple choice question based on purification, which is to be accomplished.
Q: Experimental: A. Preparation of tetrakis(triphenylphosphine)copper(1) tetrafluoroborate,…
A:
Q: substance classification (check all that apply) 1000X 10,000,000X Ogas Oliquid normal Osolid…
A: Sketch of a substance.
Q: profile-image Time remaining: 00 : 09 : 27 Chemistry A group was given the responsibility of…
A: Solutions- The solubility of three different solvents are given in g/100ml solvent
Q: Sedimentation and Decantation
A: These methods are used for separation of mixture in solution. In sedimentation , the insoluble…
Q: Chromate-dichromate system 1. Prepare a clean spot plate and label four wells. Place 5 drops of 0.…
A: To complete the table with observations:
Q: Report Sheet Water Purification B. Sedimentation and Coagulation Sand Filtration - continuation…
A: Aluminum sulfate and limewater mixture is used for water purification.
Q: Very pure silver nitrate standard reagent requires standardization with primary standard NaCl or KCl…
A: Silver nitrate standardization requires Nacl primary standard. It is true.
Q: Based on the solubility data which solvent(s) used in this experiment would be an effective grease…
A: When any solvent dissolves any substance, we can keep in mind the rule that ' Like dissolves like'.…
Q: It refers to the general term of adsorbent media used to visualize chromogenic compounds. A.…
A: Chromatogram refers to the general term of adsorbent media used to visualize chromogenic compounds.…
Q: In one paper chromatography, the Rf for spots X and Y are 0.5 and 0.35 respectively. The solvent…
A: In paper chromatography Rf value is the ratio of distance travelled by compound to distance…
Q: Which statement is valid when the multiple extraction and single extraction is compared. The…
A: Single extraction is the extraction in which only single extraction is done hich is one step whereas…
Q: A sample of pure water was spiked with 0.520 ng/mL silver ion. Ten replicate determinations of the…
A: Given, Sample of pure water is spiked to =0.520ngmL
Q: Because of the risk of lead poisoning, the exposure of children to lead-based paint is a significant…
A: Answer is explained below.
Q: Use the data below from the titration of two water samples. Calculate the average ppm for the two…
A: Hardness of water is caused by polyvalent metallic cations, though the divalent cations, such as…
Q: 1. Sensitivity in a flow-injection analysis is directly proportional to the height of an analyte's…
A: Answer is option e Increase in flow rate, decreasing the length and diameter of tubing using a…
Q: One litre of aqueous sample containing the organic pollutant, polychlorinated biphenyl (PCB), was…
A: Distribution ratio /partition coefficient is the ratio of concentration of solute in organic layer…
Q: I) Choose the Correct Answer from the Multiple-Choice List (10) 1. Which of the following is not a…
A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…
Q: Carbon nanotubes can be produced by ..method * chemical vapor deposition Sol-Gel physical vapor…
A:
Q: TRUE OR FALSE Powders that have low density and high porosity are free flowing. Surface roughness…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: Solute, A, has a distribution ratio between water and ether of 7.5 A 50 ml aqueous solution of 1M of…
A: Given: Distribution ratio= 7.5 Volume of aqueous solution= 50 mL Volume of organic solution (ether)=…
Q: Anion Test - Sulfate (SO42-) Procedure : Mix 5 drops of SO42- (Na2SO4 0.5 M) with 5 drops of HCl…
A: Answer: Sulfate test: Barium chloride (BaCl2) is used to detect the sulfate anion (SO42-) in aqeous…
Q: 4. Phthalate and formate ions can be separated using Ion Chromatography. Data obtained for a sample…
A: A question based on analytical separations that is to be accomplished.
Q: Task: You are a forensic analyst employed at the Baltimore County Forensic Lab. You plan to perform…
A: answer - The mobile phase is generally a mixture of non-polar organic solvent, while the stationary…
Q: A 100 mL of 0.375 M CH3COOH solution was shaken with 1.0 g charcoal for 5 min. After filtration, 10…
A: I have given a detailed solution to the question as follows:
Q: The following statements are true for any chromatographic analysis except: The analyte component…
A:
Q: Post-Lab Question(s) 1. Write an experimental procedure describing how to use recrystallization…
A: According to the given question, the compound contains two impurities. Both the impurities are…
Q: The following conditions may not cause tailing EXCEPT a. Thick filter paper as the stationary phase…
A: Tailing in thin layer chromatography : Due to the using high concentration of solute or other…
Q: Please help me there are multiple parts, double check your answer as previous tutors got it wrong.
A: The given illustration is the procedures for the preparation of borax solution.
Q: 20. The possible reason for the ignition of gravimetric precipitate is I. for its mass to be lower…
A: During gravimetric analysis most important step is ignition.
Q: CREATE A SCHEMATIC DIAGRAM USING THE PROCEDURE: Weighing of standard reagents 1. Make an…
A: Chemists use standard reagents to avoid worries about the purity of the chemical compounds. While…
In gravimetric analysis, volatile solvents are used _______.
- to rinse the precipitate and remove adsorbed surface impurities
- because they can be obtained in a purer form than aqueous solvents
- because they are easily removed from the precipitate by ignition
Step by step
Solved in 3 steps
- 2. In one gravimetric analysis, the aluminum in a 1.2g sample of impure NHAI(SO4)2 was precipitate as hydrous ALO3.XH2O. The precipitate was filtered and ignited at 1000 °C to give anhydrous Al2O3 which weighed 0.1798g. Calculate the % Al inthe sample. 3. A sample of 0.4500g impure potassium chloride was dissolved in water treated with excess silver nitrate solution. 0.8402 g of silver chloride was precipitated. What is the percentage of potassium chloride in the sample?mass Br- = 5.32 * 103* 79.904 = 0.4255 g. Os : What concentration Of Fez(SO4)3 (aq) is required for the olution to have [Fe*3 lag)] = 0.32M ? ) 0.16 M. %3D 0.080 M. 0.32 M.QUESTION 4 To prevent inclusion from occurring during precipitation, the technique to follow is I. fiter precipitate with less porous paper II. crystal growth be made to occur more slowly III. use of dilute analyte with concentrated precipitant IV. addition of soluble electrolyte O lonly IV only O I| & IV O I & III Il only
- 1. Straight lime softening A groundwater was analyzed and found to have the following composition (all concentrations are as CaCO): Estimate the lime dose (in mg 1.) required to soften the water. HCO 155mg/1 Ca 210 mg Mg-15mg/1 Alk.-260 ml Temp-10C 2. Excess lime softening A groundwater was analyzed and found to have the following composition (all concentrations are as CaCO)). Estimate the lime dose (in mg/L.) required to soften the water.. H:CO 155mg/1 Ca 180 mg/1 Mg-60mg/1 Alk. -260 mg/1 Temp-10C8. The process by which a diverse ion gets trapped by a growing precipitate particle but does not become part of the crystal lattice A. occlusion В. adsorption C. post-precipitation D. inclusion...before addition of solvent - ▪ What are two methods of extraction A)liquid-liquid, Solid Phase Extraction B)solid-solid, Gas phase ▪ C)evaporation, derivatization
- 1. What is used to change the chemical form of some precipitate that do not have a constant composition after drying? 2. If 2.376 g of steel gave 0.402 g Ni(DMG)2, what is the wt. % Ni in the steel? (Express your answer to 4 significant figures.) MMNi = 58.69 MMDMG = 116.12 MMNi(DMG)2 = 288.91Determine the solubility of Ag2SO3 (Ksp=1.5x10-14; MW=295.8 g/mole) in a 0.2 M solution of Na2SO3.If Vsu= Vorg, how many times should the extraction process be repeated in order for 1 g of substance with KD= 2.25 to pass 90.5% to the organic phase?
- Please help me out with making flowchart with thes steps. Write the result. Procedure 1. Place 20 drops of each of the following aqueous solutions to separate centrifuge tubes: 0.1M Cr (NO3)3, 0.1M Al (NO3)3, 0.1M Co (NO3)2, 0.1M Zn (NO3)2, 0.1M Mn (OH)2, 0.1M Ni (NO3)2, 0.1 M Fe (NO3)3. Make each solution basic by adding few drops of 6M NH4OH. Confirm using a litmus paper. 2. Add 5 drops of freshly prepared 6M (NH4)2S to each centrifuge tube. Place the samples in the centrifuge machine for 3 mins. After centrifuge record results. Decant the supernatant liquid of all the samples. 3. Add one drop of NH4OH in each centrifuge tubes. Add 20 drops of distilled water in each centrifuge tubes. Then add a few drops of 6M HCl in each solution. Place the samples in the water bath for 10 mins. After water bath, centrifuge the samples for 3 mins. 4. After centrifuge, add a few drops of 6M NH4Cl in each sample. Decant the supernatant liquid in each sample. 5. To the centrifuge containing…iii) Upon cooling the filtrate from step il, some tiny crystals appear in the filtrate. Addition of a few drops 1M K₂CrO₂ produces al yellow precipitate confirms the presence of: Ag ●Pb²+ O Pb² and Hg₂2 H₂2Solve this gravimetric analysis problem. For the determination of Zn (AW = 65) gravimetrically in a sample it is precipitated and weight as Zn2Fe (CN)6 (mw = 342).• Calculate the weight of Zn in a sample which gives 0.35 g precipitate.• Calculate the weight of the precipitate which can be produced by a sample containing 0.5 g Zn?