Which of the following statements is TRUE regarding an ideal precipitating reagent? Of unknown chemical composition. Of sufficiently low solubility that has a significant loss of the analyte occurs during filtration and washing. It must have large particles. O Reactive with the constituents of the atmosphere.
Q: 4) How would your calculated value of Ksp be affected by errors introduced from the following…
A: The constant relating the dissolved ions' concentrations is taken as "Solubility product". Some…
Q: What is the purpose of acetone in the final filtration of the precipitate in Gravimetric…
A: The purpose of acetone in the final filteration of the precipitate in gravimetric determination of…
Q: In supposing that a linear relationship exists between the readings taken from the apparatus and…
A: We will first plot the calibration curve using turbidity (y axis) vs concentration (x axis) data.
Q: True or False: Blank titration is indicated for the determination of the concentration of a sample.…
A: A blank titration gives an idea of how much titrant is needed to the titration with sample. The…
Q: 1. A process where impurity is precipitated along with the desired product. 2. Calculate the…
A: Gravimetric analysis is the process in which impurity is also precipitated along with the desired…
Q: While working in a metal processing facility, Letlen had accidentally mixed two metal vats together…
A: Given the total mass of the homogenous alloy sample of Cd and unknown metal taken for titration =…
Q: How was the precipitate obtained after filtration? By scraping from the filter paper and…
A: Filtration is used to separate an insoluble solid from a pure liquid or a solution
Q: Explain how preconcentration of cations with an ion exchanger works. Why must the concentrated acid…
A: Ion exchange chromatography involves the reversible exchange of ions between a solid phase (that is…
Q: In complexometric titration ‘the reaction with analyte should be rapid and complete’ give reason…
A: Complexometric titrations are those titrations in which chelates or soluble complexes, usually…
Q: A solid chloride sample weighing 0.09969 g required 18.25 mL of 0.05205 M AGNO3 to reach the…
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Q: Explain how to produce an ideal precipitate in the analysis of sodium fluoride, NaF with silver…
A: by reaction of AgNO3 with NaF, precipitation of AgF occurs. the reaction is as follow :…
Q: What is the rationale of diluting the solution in the flask with washing distilled water at the…
A: Titration is done in neutralization reactions or redox reactions to determine the concentration of…
Q: Dissolved 0.273 grams of pure sodium oxalate (NaCO) in distilled water and added sulfuric acid and…
A:
Q: What weight of the soda ash (impure Na2CO3) should be taken for analysis in order that the number of…
A: 1 mol Na2CO3 (or CO3 2-(aq)) reacts with 2 moles of acid H+(aq). The balanced equation is: CO3…
Q: What is NOT recommended for precipitation of crystal deposits: precipitation in presence of…
A: The correct option is option c.
Q: Calculate the gravimetric factor of the following. 2 Fe3O4 is sought(Analyte), 3 Fe2O3 is weighed…
A: Given, Sought : Fe3O4 Precipitate : Fe2O3
Q: Discuss whether the indicator method applied for determination of alkalinity is satisfactory, is…
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Q: For redox titrations, the oxidation state of the analyte may need adjusting. The analyte can be…
A: Ans. Oxidizing agent that is paired with incorrect elimination chemistry: (A) The excess stannous…
Q: a = Most organic compounds like sugar and table salt are soluble in organic solvents like water and…
A: a and c both are correct.
Q: Why homogenously formed precipitates are better suited for analysis than a precipitate formed by…
A: The gravimetric method is inherently more accurate than the volumetric method because the…
Q: A mixture consisting of 15 mole % Phenol in water is to batch distilled at 260 torr, what fraction…
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Q: A 500.0mg of butter was warmed and shaken vigorously with water. The undissolved material was…
A: A Volhard method is an inorganic quantitative analytic method in which an indirect or back titration…
Q: A mixture consisting of 15 mole % Phenol in water is to batch distilled at 260 torr, what fraction…
A: Step 1 , Step 2 ,
Q: Why should deionized water he used throughout the analysis?
A: Metal ions are formed by loss of electrons from metal. Electrons are negatively charged particles…
Q: In the determination of Mass% NaOCI in Bleach Sample (Titration), can sulfuric acid be used instead…
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Q: In this experiment, you will take a 25.00 mL aliquot of vinegar and dilute it to 250.0 mL. You will…
A: Suppose, concentration of acetic acid in diluted vinegar solution is S1 M To determine S1 the…
Q: Dissolved 0.273 grams of pure sodium oxalate (Na2C204) in distilled water and added sulfuric acid…
A: The overall reaction is, 2KMnO4+3H2SO4+5COOH2→K2SO4+2MnSO4+8H2O+10CO2↑ The overall ionic equation…
Q: Which characteristic of a precipitate doesn’t do well for gravimetric analysis. a Readily…
A: The determination of concentration of analyte is done using gravimetric analysis. The analyte is…
Q: A pain reliever is soluble in cold water to the extent of 1.0g/1310 mL and soluble in diethylether…
A: Formula : Distribution coefficient= (solubility in organic) ÷ (solubility in aqueous) Moles of H2O =…
Q: Why a precipitate of manganese dioxide be removed from the potassium permaganate solution before…
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Q: Why a filter paper cannot be utilized for the removal of potassium permaganate precipitate?
A: Filter paper can be defined as a semi-permeable paper that helps us to separate fine solid particles…
Q: How do you choose the most suitable precipitate for gravimetric purposes if given many choices?
A: A precipitate is formed when an insoluble compound is dissolved in a solution when a precipitating…
Q: Why is high supersaturation undesirable in a gravimetric precipitation?
A: Qualitative analysis is a branch of chemistry that deals with the identification of elements present…
Q: 1. In using the centrifuge machine, how will this be remedied if there are only 3 separate liquid…
A: In centrifuge machine, A centrifuge force is generated by a high speed rotation is used to separate…
Q: Include relevant qualitative test(s) in your explanation in the separation of benzoic acid from NaCl…
A: Benzoic acid is an organic acid and NaCl is a salt.Firstly, a qualitative test could be done based…
Q: True or False Very Insoluble precipitates are not the best candidates for gravimetric analysis.
A: In order for the analysis to be accurate, The ion being analyzed must be completely precipitated.…
Q: The standardization of same titrant during the determination of BOD5 of water sample was done…
A: The BOD5 test, also known as the Biochemical Oxygen Demand test, is a biochemical test that measures…
Q: Why are many ionic precipitates washed with electrolyte solution instead of pure water?
A: The polar substances are the one which is separated by electric charge and leads to the formation of…
Q: Calculate the purity of the gold piece
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Q: The NaOH titrant in this experiment was prepared to be approximately 0.1 M and then was…
A: Given that, in an experiment, approximately 0.1 M of NaOH solution was prepared and then was…
Q: To separate three organic compounds from an aqueous solution, one basic, one acidic and one neutral…
A: The separation can be done using the extraction technique based on the polarity of compounds. The…
Q: Why is high relative supersaturation undesirable in a gravimetric precipitation
A: Qualitative analysis is a branch of chemistry that deals with the identification of elements present…
Q: 00 mL of a diprotic acid primary standard solution was accurately prepared to a concentration of…
A: Given: Volume of diprotic acid = 10.mL Concentration of Diprotic acid = 0.1431 M To Calculate: The…
Q: Analyze the effects caused by various impurities on precipitate during the gravimetric analysis and…
A: Gravimetric analysis is one of the techniques in which the amount of a particular component of an…
Q: A mixture was known to contain three of the four compounds in the table. After the mixture of the…
A: Based on the solubility of the compounds A, B and C in the various solvents such as cold water, hot…
Q: concentration and pH of the H2SO4 solution.
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Q: In a reaction involving the iodination of acetone, the following volumes were used to make up the…
A: Here the mixture contains 5ml of 3.40M acetone, 10 ml of 1.50M HCl ,10 ml of 0.004M and 25 ml water.…
Q: Which of the following is a good description of a standard solution as a titrant? a) selectively…
A: The standard solution of titrant is the solution with a known concentration.
Q: Q1. Dissolved 0.273 grams of pure sodium oxalate (Na2C0.) In distilled water and added sulfuric acid…
A: The question is based on redox titrations. we have added excess of KMnO4 to the Sodium oxalate. the…
7. Please provide detailed explanation.
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- Tris(pentatluorophenyl)borane, commonly known by its aeronym BARF, is frequently used to initiate polymerization of ethylene or propylene in the presence of a catalytic transition metal compound. It is composed solely of C, F, and B; it is 42.23% C and 55.66% F by mass. a. What is the empirical formula of BARF? b. A 2.251-g sample of BARF dissolved in 347.0 mL of solution produces a 0.01267-M solution. What is the molecular formula of BARF?A chemist receive different mixtures for analysis with the statement that it contain NaOH, NaHCO3 , Na2CO3 or compatible mixtures of these substances together with the inert material. From the data given, identify the respective materials and calculate the percentage of each component. 1.000g samples and 0.2500 N HCl were used in all cases. Sample 1 With phenolphthalein as the indicator, 24.32 ml of HCl was used. A duplicate sample required 48.64 ml HCl using methyl orange as the indicator. Sample 2. With phenolphthalein as the indicator it uses 28.2 ml of HCl to make it colorless and added with methyl orange indicator and uses 11.3 ml of HCl to reach the end point.9. An aqueous solution of sulfuric acid is prepared by mixing a secondary standard of sulfuric acid with deionized water. The aforementioned acid is to be used as a titrant hence its concentration must be accurately determined. To do this, Engr. Polinar, standardized the titrant by titrating two liters of ammonia at 0.90 atm and 30 deg C. From the experiment, 134 mL of the titrant was necessary to neutralize the ammonia. Determine the concentration of the acid in terms of normality? 10. Engr. Forcadela is optimizing a plastic formulation by manipulating the phosgene concentration injected as a gas during the reaction. To obtain credible results, he considered the propensity of phosgene to dissociate into carbon monoxide and chlorine gas at 395 deg C. Performing an experiment at the aforementioned temperature, an equilibrium is reached amongst the species where the total pressure is at 3 atm. If the equilibrium constant expression in terms of concentration for the reaction at 395 deg C…
- Gravimetric Analysis. Please include complete solution, thank you. In the gravimetric determination of sulfate in a 0.2841 g sample of pure Na2SO4, a BaSO4 precipitate weighing 0.4604 g was obtained. The weight of the precipitate was smaller than the theoretical one, since some BaSO4 was converted to BaS during the heating process. Calculate the percent of BaS in the precipitate and percent error of the analysis.Caculate the volume (mL) of 1.0 M potassium carbonate (K₂CO₃) needed to prepare 5.0g of the COPPER pigment. This is where the balanced chemical equation come in. You should be able to relate the moles of pigment to the moles of K₂CO₃, and from that calculate the volume of 1.0 M K₂CO₃ solution needed. Please report your value as XX.X mL (one deicmal point and no units).Q/ Mohr's method uses the potassium chromate indicator and this indicator makes the equivalent point not identical to the end point. A sample weighing 5.592 g of BaCl2 is dissolved in 500 mL of water. Calculate the percentage of chloride in the sample when 25 mL of the sample is titrated and requires 33.47 mL of 0.1098 N AGNO. SOLUTION:
- 1. A 0.3516 g sample of commercial phosphate detergent was ignited at a heat to destroy the organic matter. The residue was taken up in hot HCI which converted P to H3PO4. The phosphate was precipitated as MGNH4PO4.6H2O by addition of Mg+ followed by aqueous NH3. After being filtered and washed, the precipitate was converted to Mg2P2O7 by ignition at 1000 OC. This residue weighed 0.2161 g. Calculate the percent P (30.974) in the sample? Ans 17.11%Which among these objects should you use to filter the precipitate in precipitation gravimetry? Dialysis membrane Normal filter paper Strainer Ashless filter paperGroup I Cations of 6 M HCI; centrifuge for ~1 minute. Decant the solution and add an additional one or two drops of 6 M HCI; if no additional precipitate forms, the precipitation is complete. If it was incomplete, centrifuge to obtain the additional solid; then decant the liquid, add 1 or 2 drops of 6 M HCI, and repeat the procedure until no precipitate forms. Discard the supernatant into the appropriate waste container or keep for later experiments if your instructor so indicates. Add 1.5 mL of cold deionized or distilled water to the precipitate to wash; agitate, centrifuge, and discard the water to the appropriate waste container. Repeat the wash procedure. The solid contains Pb2*, Ag*, and/or Hg22*. Step 2. Separation of Pb2*. Add 1 mL of boiling water to the solid from step 1. Agitate, centrifuge, and decant the liquid. Repeat the extraction, combining the supernatant. The liquid should contain Pb?* if any is present. Step 3. Testing for Pb2*. Add 2 or 3 drops of 0.2 M K2CRO4…
- E. Analysis of a mixture consisting of NaOH + NażCO3 + inert matter gives the following data: Sample portions are titrated. With one portion, an end point with phenolphthalein is obtained in cold solution, with 44.52 mL of 0.5000 N HCI. The other portion requires 46.53 mL of the acid for an end point with methyl orange. Calculate the percentage composition of the original sample. 10.00 g. Its aqueous solution is diluted to 250.0 mL and two separate 25.00 mLSuppose that extra volume (more than the actual volume) of 0.2 M NaOH solution was used to reach the end-point in the titration process for the determination of the % purity of aspirin sample (0.5 g). Which of the following is correct? The calculated and the actual percent purity values for the aspirin sample will be the same, since the extra added volume of NaOH solution has no effect on the % purity determination for the aspirin sample. We need to know the actual volume (the real volume that should be used in titration) as well as the used volume of NaOH solution to make a true comparison between the actual and the calculated % purity values for the aspirin sample. The calculated % purity value will be lower than the actual % purity value for the aspirin sample. The calculated % purity value will be higher than the actual % purity value for the aspirin sample.app.101edu.co Question 16 of 25 A 185.0 mL sample of 1.200 M Pb(NO3), is mixed with 139.50 mL of 1.500 M NaCl, and the PbCl, precipitate is filtered from the solution. Then 200.0 mL of 3.000 M NaBr is added to the remaining solution, and the PbBr2 precipitate is also collected and dried. What is the mass (in grams) of the PbBr2 precipitate, assuming the yield in each precipitation step is 100%? 1 3 6. 8. 6. +/- 2. LO