One of the following statements is incorrect: A primary standard should be highly pure, has atmospheric stability and absence of hydrated water O A standard solution should react completely with the analyte without a definite chemical equation Standardization is required when the titrant solution molarity is approximate Back-titration is required when the rate of the reaction slow Titration error is the difference between equivalence point volume and end point volume
Q: One of the following statements is incorrect: Titration error is the difference between equivalence…
A: A titration is the process of determining the quantity of a substance A by adding measured…
Q: of the following statements is incorrect O A standard solution should react completely with the…
A: Incorrect statement is:
Q: In his next experiment, he needs to determine the Ksp and identity of a sparingly soluble salt MF2.…
A: Since you have asked a question with multiple subparts, we will answer only first 3 subparts for…
Q: Which are TRUE for the use of indicators with dichromate? Dichromate is orange and changes color to…
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Q: 12Electrodes of the first kind have poor precision The answer is either true or false 16Voltammetry…
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Q: Match the relational phrases to the corresponding concepts. Zwitterion Isoelectric Titration point…
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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: Mg-EDTA and Ca-EDTA complexes are equally strong that’s why both Ca2+ and Mg2+ are considered when…
A: 1) The given statement is, Mg-EDTA and Ca-EDTA complexes are equally strong that’s why both Ca2+ and…
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Q: В. In his next experiment, he needs to determine the Ksp and identity of a sparingly soluble salt…
A: In the above solution MF2 is sparingly soluble. It is titrated with 0.0110M HNO3.
Q: I need help calculating the remaining values please!!!!
A: A question based on mole concept that is to be accomplished.
Q: 2. After preparing the buffer, they decided to determine the buffer capacity of the solution by…
A: Buffer capacity can be expressed as:
Q: Compute for the molar concentration of EDTA standardized using 50.00 mL of the CaCO3 primary…
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Q: solution is mixed with 40.00 mL of 1.2% (w/v, g/mL) Na2CO3 solution. What volume of 0.087 M HCl will…
A: The question is based on the concept of titrations. we are titrating a mixture of bases with a…
Q: Drye quantity of primary standard potassim hydrogen phthalate (CHP) for about 2 heat 110°C (Fig.…
A: Given: mass of KHP = 0.7624 g molar mass of KHP = 204.22 g/mol Titration Initial volume (mL)…
Q: non hygroscopic
A: KHP is considered as primarily standard solution. Because is not absorbe moisture from atmospheres…
Q: dentify the type of titration method. Choose the best answer. - ✓ can be carried out at low pH or…
A: Fajan titration method Mohr titration method Volhard titration method Type of precipitation…
Q: A salt sample was analyzed for its purity. A 0.5000g sample was dissolved in water and diluted to…
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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: Briefly explain why the sparingly soluble product mustbe removed by filtration before you…
A: In Volhard's determination of the ions, the sparingly soluble ions must be removed by filtration…
Q: All of the following regarding Argentometric titration are correct except a. Chromate indicator is…
A: fajan method An adsorption indicator shows two different colour in adsorbed or desorbed from is…
Q: Coulometry consumes larger amount of analyte than voltammetry Electrodes of the second kind can…
A: All question are true/false questions based on electrochemistry. The knowledge of electrodes,…
Q: Calculate the gravimetric factor of the following. 2 Fe3O4 is sought(Analyte), 3 Fe2O3 is weighed…
A: Given, Sought : Fe3O4 Precipitate : Fe2O3
Q: What is/are the principle/s involved on ACIDIMETRIC ASSAY BY DOUBLE INDICATOR TITRATION?
A: Titration is a common laboratory method of quantitative chemical analysis to determine the…
Q: 2 A student determined the concentration of a weak acid, acetic acid, by a titrimetric method using…
A: A question based tools in analytical chemistry that is to be accomplished.
Q: The sulfate in a247.1 mg sample was precipitated as BasO4 by addition of 25.00 mL of 0.03992 M…
A: Given: Mass of sulfate = 247.1 mg Volume of BaCl2 = 25.00 mL Molarity of of BaCl2 =…
Q: What conclusion can be derived from the following sentences regarding analytical methods: I.…
A: The correct statements are : II. Volumetric methods do not require calibration if a primary standard…
Q: Compute for the molar concentration of EDTA standardized using 50.00 mL of the CaCO3 primary…
A: EDTA complexometric titration is based on the fact that many metallic ions form stable complexes…
Q: Identify the type of titration method. Choose the best answer can be carried out at low pH or…
A: Given:- We have to choose the following titration methods in the above questions. a)Fajan b) Volhard…
Q: Quantitative analysis of metal ions in pharmaceutical and cosmetic products can be done using direct…
A: Weight of the sample= 0.1000 g Soluble salts present in the sample solution = Fe3+, Mg2+ and Al3+…
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: The quantitative determination of pyridoxine hydrochloride can be carried out by methods: A.…
A: A multiple choice question based on coordination compounds that is to be accomplished.
Q: All of the following regarding Argentometric titration are correct except: a. Chromate indicator is…
A: we have to find the incorrect one, from the following Argentometric titration
Q: A foot powder sample containing Zn was dissolved on 50.00 mL water and was titrated to the end point…
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Q: A student has performed a set of titrations using EDTA as the titrant and a zinc standard solution…
A: Given average titre volume = 13.91 mL absolute uncertainty = ± 0.11 mL
Q: IV. Laboratory Report: (Parts 1,4,5 are typed.) 1. Title page including the average calculated value…
A: Given: Titration KHP (g) Vfinal (mL) Vinitial (mL) Vtotal NaOH(mL) 1 0.7430 33 0.0 33.00 2…
Q: Which error will lead to negative deviation from the theoretical Keq? a. cuvette was filled to the…
A: Which error will lead to negative deviation from the theoretical Keq. Answer : Correct…
Q: An auxiliary competing agent is used in EDTA titrations to slow down the titration. keep some…
A: The solution is given below -
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: A student recorded the following end-point volumes in an iodometric titration using starch…
A: Titration error is -3.89 x 10-4 .
Q: 1. It is a reagent of known concentration used in titrations * analyte solution normal solution…
A: Titration is a method to determine the concentration of an unknown solution by using the solution of…
Q: Determination of water hardness using complexometric titration. During sample analysis (ppm…
A: Given: Determination of water hardness using complexometric titration. To determine EX…
Q: All of the following regarding Argentometric titration are correct except: a. Chromate indicator is…
A: Titration involving silver are known as Argentometric titration .The major precipitation reaction is…
Q: A small amount of Mg-EDTA is often added in the titrimetric determination of water hardness. Why?…
A: EDTA a complexing agent designed to bind metal ions quantitatively, forming stable, water soluble…
Q: What conditions must be followed to perform complexometric titration? A. presence of a catalyst B.…
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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: Determination of Water Hardness experiment was designed and suitable for bottled mineral water. What…
A: Principle: The determination of hardness is carried out by titrating water sample with Sodium salt…
Q: A required characteristic of a primary standard with which we would use to standardize our sodium…
A: The substances which do not react with the components of air in open state and retained its…
Q: 2 A student determined the concentration of a weak acid, acetic acid, by a titrimetric method using…
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Q: one of the following is not correct about Volhard method: a. Ksp of silver thiocyanate is less than…
A: The solution is given below -
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- Which of the following accurately corresponds to the composition of the precipitate obtained from a mixture of proteins A and B (properties below) by employing the specified (NH4)2SO4 concentration assuming the salt is added in bulk i.e. one step? Protein % (NH4)2SO4 to precipitate A 40 B 70 a. At 30% (NH4)2SO4 : A b. At 40% (NH4)2SO4 : B c. At 60% (NH4)2SO4 : A d. At 70% (NH4)2SO4 : B e. None of the aboveThe indicator phenolphthalein may be regarded as a weak monobasic acid. Explain briefly why the indicator is coloured pink when the solution in which it is present has excess of alkali.In complexometric titration ‘the reaction with analyte should be rapid andcomplete’ give reason with suitable justification for the above statement.
- FeCl3 and MgCl2 solution was prepared by dissolving FeCl3 (AR) and MgCl2 (AR) in distilled water. Secondly, under rapid stirring, NaHCO3 powder was slowly added to the above solution to the desired basicity (B = 1) which had been proved to be the optimal B for turbidity removal. Thirdly, Na2HPO4 (AR) was added to the PFMC solution as a stabilizer ([Na2HPO4]/([Fe] + [Mg]) = 0.08). i. The the chemical equation of the Synthesis. ii How much weight need to put NaHCO3 above solution the desired basicity (B=1) iii. How much weight need to put Na2HPO4 on PFMC solution refering ([Na2HPO4]/([Fe] + [Mg]) = 0.08).Quantitative analysis of metal ions in pharmaceutical and cosmetic products can be done using direct and indirect complexometric titrations employing concepts of complex formation, masking, and blocking. For example, all Fe3+, Mg2+, Al3+ and Zn2+ can form a complex with EDTA at pH 10. However, at pH 5, Mg-EDTA complex formation is inhibited, whereas at pH 2, only Fe-EDTA complex formation is favored. Knowing these, an analyst tried to determine the % composition of a 0.1000 g sample containing soluble salts of Fe3+, Mg2+, and Al3+. The sample was initially dissolved in 250.0 mL of distilled water. To determine the total ion content of the sample, a 50.00 mL aliquot was buffered to pH 10.00 before adding 50.00 mL of 0.0500 M EDTA, and the excess EDTA was back titrated with 24.18 mL of 0.0750 M standard Zn2+ solution until the EBT endpoint. Another 50.00 mL aliquot was buffered to pH 2.00 and was added with small amount of SCN- producing blood-red Fe(SCN)2+ complex. This was titrated…In an unprecedented initiative, the professor chose you to carry out the determination of a special sample in order to verify the inherent indication system. For that, an aliquot of 25.00 mL of a solution containing Fe(III) salts was titrated with EDTA 0.00982 mol/L, using potassium thiocyanate as indicator. In this case, you have found the volume of 31.10 mL of titrant to End Point. Based on the information given in the table, choose the option that best describes/explains the process linked to the indication system of the Final Point of the degree: (a) The indication of the system will be given by the disappearance of the reddish coloration, due to the displacement reaction: Fe(III) complex with EDTA is formed in detriment of the Fe(III) complex with thiocyanate. (b) The indication of the system will be given by the appearance of a reddish color, in function of the displacement reaction: Fe(III) complex with thiocyanate is formed in detriment of the Fe(III) complex with EDTA. (c) The…
- Q: The concentration of the sulphate ion in a mineral water can be determinedby the turbidity which results from the addition of excess BaCl2, to a quantityof measured sample. A turbidometer used for this analysis has been standardisedwith a series of standard solutions of NaSO4. The following resultswere obtained:Standard solution Conc. (SO4)2− (mg/L) Reading of turbidometerS0 0.00 0.06S1 5.00 1.48S2 10.00 2.28S3 15.00 3.98S4 20.00 4.61i. In supposing that a linear relationship exists between the readings takenfrom the apparatus and the sulphur ion concentration, derive an equationrelating readings of the turbidometer and sulphate concentration(method of least squares).ii. Calculate the concentration of sulphate in a sample of mineral waterfor which the turbidometer gives a reading of 3.67.What is/are the principle/s involved on ACIDIMETRIC ASSAY BY DOUBLE INDICATOR TITRATION?Calcium fluoride is considered as a relatively insoluble compound and therefore lime or slakedlime has been considered as a possible material to remove excess fluoride in water of boreholesin certain parts of the country. The solubility product of CaF2 is Ksp = 3 x 10 – 11 and that ofCa(OH)2 isKsp =8x10-61. How much lime can be added to the water to remove 10 mg of F- ion per litre ofborehole water?(The atomic masses are Ca: 40.08; F: 19.00; O: 16; H: 1)
- A student has a sea water sample which contains Ca2+ ions . Describe briefly how he willdetermine the concentration of Ca2+ ion in the sample using a simple titration. Explain the colourchanges at the endpoint. Which medium is suitable for performing the titration, acidic or basic medium and why?6. The quantitative determination of pyridoxine hydrochloride can be carried out by methods: A. Complexometry B. Argentometry C. Alkalimetry D. Acid-base titration in a protogenic solvent medium E. Acid-base titration in a profile solvent mediumIn this activity, you will develop an experimental procedure to solve a problem. Consider the followingscenario:You are the manager of a chemical stockroom, and find a bottle containing approximately one liter of aclear and colorless solution of unknown identity and concentration. Your only clue to its identity is thatit was found between bottles of silver fluoride and sodium fluoride, so it is likely an aqueous solution ofone of those two compounds. You will need to develop a procedure to determine the following:a) The identity of the unknown solutionb) The concentration of the unknown solutionWrite out a precise procedure, which includes all glassware, reagents, and steps. You will also need towrite the calculations that you would need to determine the concentration of the solution. Assume thatyou have access to any reagent you might need