Data Sheet with Sample Results Note: results that require calculations are purposely left blank and the data for saturated and dilute solutions should be considered as averages of two trials.
Q: Increasing reagent concentration makes the change in pAg larger.
A: we know, pAg = -log[Ag+]. so with increasing the concentration of reagents,pAg decreases. Option C…
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Q: Assume the data below was collected for two different sample solutions using the same experimental…
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Q: Can you proceed with sample analysis even without standardizing the titrant solution? Why or why…
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Q: A student was careful to make and stir all of her standard solutions immediately before measuring…
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Q: Differentiate simple and steam distillation. (minimum of 5 sentences)
A: Distillation is process which involve the conversion of a liquid into vapour that is condensed back…
Q: Sources of Error Determine the relationship between the observed/apparent value (EX) VERSUS that of…
A: Given: Not all the solid was transferred during the filtration of the precipitate.
Q: In chromatography, if the temperature of oven increases, what will be its effect on retention time…
A: Chromatography It is the separation and purification technique used in which a stationary phase and…
Q: Why can’t we use a simple distillation for the solution containing ethyl acetate and butyl acetate?
A: Ethyl acetate, CH3COOC2H5 is a simple ester, with boiling point of 77.1°C while butyl Acetate has…
Q: this experiment, yield was not important, but in onsite lab, as well as large-scale processes, a…
A: To answer question 14 and 15.
Q: What is the purpose of NaCl in the experiment? Will the same result be obtained if thereacting…
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Q: Table 1: The result for test tube I to 8 using of BSA stock solution. Tube BSA Cone H;O (ml) BSA…
A: Lambert Beer's law states that absorbance of a solution is proportional to concentration of…
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: 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: Three sample, X (neutral), Y (basic), and Z (acidic), were mixed and dissolved together in…
A: Dissolve the mixture in dichloromethane and separate the organic and aqueous layer using liquid…
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: If insoluble impurities eg. dust, tissues, filter paper etc were mixed with the sample how will…
A: Melting Points:- The melting point of a substance is defined as the temperature at which it melts.…
Q: A sample was placed on a chromatography column. Methylene chloride was used as the eluting solvent.…
A: Chromatography is a laboratory method for the isolation of mixtures. The substance is immersed in a…
Q: What could have gone wrong in the separation and purification process to result in the disparity…
A: According to option A if benzoic acid and sand are weighted in wrong way then it is very possible…
Q: B: Similar to Part A, using 97 mL of an aqueous solution containing 7.22 g of the compound with a KD…
A: w = 7.22 g v = 97 ml portion = 41 KD = 5 n= 2
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: This is the graph for gel filtration chromatography. Can you please explain why the graph has the…
A: Gel filtration chromatography is a variant of size exclusion chromatography that can be employed to…
Q: IF an analytical balance was not calbirated before gravimetry analyses, what will happen to the mass…
A: Instrument calibration is done so as to remove the unnecessary error in the analysis .…
Q: What are the types of gravimetric methods? Give an examples where each method is used in an…
A: Generally, there are four types of gravimetric methods which are listed below - - > 1…
Q: Write a flow diagram Prepare a written copy of the complete separation scheme for a solution that…
A: The complete separation scheme for a solution that contains Ag+, Fe3+, Cr3+, Ni2+, Zn2+and Ba2+ is…
Q: 1. Did the sugar dissolve faster in the hot water or the cold water? 2. What would be another…
A: Sugar dissolves faster in hot water than in cold water. Because hot water has more energy. When…
Q: Why do we use a makeup gas for some gas chromatography detectors?
A: The method of separation of components present in the mixture is termed as chromatography.…
Q: All are properties of ideal solvent for recrystallization except: Has a boiling point below the…
A: Recrystallization is a technique used to purify chemicals. Recrystallization involves the process of…
Q: A mixture contain benzoic acid, salt, powdered silica (white sand) and contaminated with coloring.…
A: Benzoic acid is soluble in organic solvents like ethyl acetate. When the mixture is treated with…
Q: If we are recrystallizing a PURE compound, what will happen to the sample if we cool the solution…
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Q: A yellow compound, dissolved in methylene chloride, is added to a chromatography column. The elution…
A: Chromatography is a laboratory method for the isolation of a mixture. In a fluid called the mobile…
Q: What parameters should be considered when choosing between distillation methods? Are there any…
A: Distillation is refining method of refining by alternating evaporation and condensation to remove…
Q: Isopropanol and water are miscible, meaning they can be combined in any ratio. So why were they…
A: 1. Isoprapanol and water are miscible due to formation of intermolecular hydrogen bonding. 2. But,…
Q: In thin layer chromatography, the stationary phase is made of and the mobile phase is made of solid,…
A: Thin layer chromatography: TLC is a chromatography technique used to seperate non-volatile mixture.…
Q: In glucose estimation using Benedict's Reagent, justify the necessity of continuously heating the…
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Q: Estimation of Dissolved Oxygen experiment I want 10 Precautions at lest for this experiment
A: Precuations
Q: What is the aim of (solids:recrystallization and melting points) experiment?
A: What is the aim of (solids:recrystallization and melting points) experiment?
Q: why is it important to apply the percent volume and percent retrieval in separation of mixtures…
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Q: ATION
A: Now, Below are the methods mentioned evaluating the steps,
Q: When using a calibration curve and beers law if one of your a diluted test solutions had an…
A: Beer- Lamberts law gives a linear relationship between concentration of the sample and its…
Q: During melting point determination, what does melting point range means? How will you know if the…
A: The melting point of a solid substance is the temperature at which it changes from solid state to…
Q: The gravimetric analysis of nickel in copper and iron, what is the purpose of "dipping" the…
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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: In handling reagent, excess reagents should be
A: The quantity of the reagent once you taken from the reagent bottle, the excess of reagent after…
Q: What might happen to your melting points if you do not cool the MelTemp between runs? The melting…
A: The temperature at which the solid becomes liquid is called melting point. Melting point is a…
Q: How do you weigh hydgroscopic samples?
A: Hydgroscopic samples contain moisture. Therefore it is measured in digital analytical balance.
Q: A mixture of unknown base and hydrochloric acid was removed with a concentration of 0.01 normal, and…
A: A titration is the process of determining the quantity of a substance A by adding measured…
Q: When extracting an aqueous solution with an organic solvent and after agitation and settling, the…
A: Given information : When extracting an aqueous solution with an organic solvent and after agitation…
Q: To which sample solution the spike will be add? the distillate>130C the mass standard the…
A: A spike is a known quantity of analyte added to a sample of test solution whether to redponse to…
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- In fractional distillation, liquid can be seen running from the bottom of the distillation column back into the distilling flask. What effect does this returning condensate have on the fractional distillation?The partial molar volumes of acetone and chloroform, in a solution in which the molar fraction of chloroform is 0.4693, are 74.166 cm3mol-1 and 80.235 cm3 mol-1, respectively. What is the volume of 1,000 kg of this solution? Data: M.M. (acetone) = 58.08 gmol-1; M.M. (chloroform) = 119.07 gmol-1.Bristol Community College Fall River, Massachusetts Experiment 6: Molar Mass of a Molecular Solid from Freezing Point-Depression Measurement Name: __________________________________ Date: _______________ Approved: ___________ DATA SHEET Mass of lauric acid (in Part II) Mass of benzoic acid (in Part II) Freezing temperature of pure lauric acid (from Part I) data from Video 2 of Part I Freezing temperature of solution (from Part II) data from Video referenced in Part II Freezing point depression, Tf ( = Tf, lauric acid – Tf, solution) Molality (m) of solution ( Eq. 1) Moles of benzoic acid ( Eq. 2) Experimental molar mass of benzoic acid (Eq. 3) Calculate the molar mass of benzoic acid, C6H5COOH. Percent error Summary Questions A student determines…
- Assuming that pentane and hexane form an ideal solution, A. Calculate the amount of pentane to be added to 65.0 g of hexane to obtain a minimum dG of mixing from mixing those two components. [MM pentane; 72.15, MM hexane; -86.18] B. Calculate the dS of mixing the components of the mixture above.Boiling Point Elevation/Freezing Point Depression T = m K where, for freezing point depression: T = T(pure solvent) - T(solution) and for boiling point elevation: T = T(solution) - T(pure solvent) m = (# moles solute / Kg solvent) Kb = boiling point elevation constant. Kf = freezing point depression constant. Kb and Kf depend only on the SOLVENT. Below are some common values. Use these values for the calculations that follow. Solvent Formula Kb(°C / m) Kf(°C / m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02Sodium chloride (NaCl) was isolated from SiO2 and CaCO3 by dissolving it in distilled water. Unmentioned is that CaCO3 is slightly soluble in water (0.001 g/100 mL). Describe the effect this fact will have on each component of the mixture: will the “isolated“ mass of each be greater than, equal to, or less than that in the sample?
- There are two separate phases, one with a composition of 12% phenol and the other with a composition of 60% phenol, from a 210 gram phenol-water mixture at 60 °C with a composition of 35% phenol. Calculate the masses of these phases.What would be the concentration in ppm of the final solution made by mixing 200. mg of ethanol into 2.5 kg of water? Report your answer in standard notation and do not include units.1. What is the mole percent of methanol in your starting solution (composed of 1.5 mL and 6 mL isopropanol)? 2. Using the vapor-liquid equilibrium data graph (NOTE: You have to make this graph using the data provided) and your answer from question 1, answer the following: If your first distillate was 49 mole percent methanol, how many theoretical plates were in your distillation setup? Data Mole % of Methanol Temperature (°C) Vapor Liquid 66.22 95.35 90.10 67.94 89.10 79.00 70.22 80.00 66.05 72.67 68.50 52.20 74.78 57.00 40.80 77.06 42.85 29.30 78.94 29.00 19.50 81.00 13.20 8.10
- It is important to always minimize the amount of solvent used, allowing for evaporation. If we add a relatively large excess, we expect our recrystallization to produce lower percent recoveries. A common mistake is to misplace the decimal, resulting in addition of 11x the solvent instead of the recommended 1.1x. If a substance dissolves in a solvent at 1g/468 mL at room temperature and at 1g/13 mL at the solvent's boiling point, what would be the maximum expected amount recovered if using 11x the minimum amount of solvent in recrystallizing 10 g of the substance? Report your answer in grams to one decimal place.It is important to always minimize the amount of solvent used, allowing for evaporation. If we add a relatively large excess, we expect our recrystallization to produce lower percent recoveries. A common mistake is to misplace the decimal, resulting in addition of 11x the solvent instead of the recommended 1.1x. If a substance dissolves in a solvent at 1g/468 mL at room…A mixture of 20 mL of isoamyl acetate (MW=130.2 g/mol and density= 0.88 g/mL) and 20 mL of methyl benzoate (MW= 136.2 g/mol and density =1.09 g/mL) is distilled. Calculate the mole percent for each component. Use these mole percents and the figure below to answer the following questions.a. What is the initial boiling point of this mixture?b. What is the composition of the vapor in equilibrium with the liquid? Is this composition the same as the composition of the initial condensate from simple distillation?c. Instead of a simple distillation, you decide to use fractional distillation. Assuming two theoretical plates, what is the composition of the first fraction collected?Use the following steps to determinr the percent error of the freezing point depressions you determined experimentally from the expected freezing point depression for each solute. Show sample calculations for sodium chloride solution. a. Use the actual molar mass of each solute to determine the expected motality of 0.234g of each solute in 4.00x10-3kg of water. Sample Calculation: b. Determine the expected freezing point depression for a solution with this motality. Sample Calculation: c. Determine the percent error of the freezing point depression you determine experimentally from the expected freezing point depression for each solute. Sample Calculation: