Q: Briefly explain why starch TS is added near end-point during iodometric titrations.
A: In an iodometric Solution starch is used as indicator.
Q: Why is rinsing of the burettes both with distilled water and solution a critical step in titration?
A: Please find your solution below : In chemical analysis, titration (volumetric analysis) is a…
Q: 10. The color change of a chemical indicator requires an over titration of 0.03 mL. Calculate the…
A: Given, The error in measurement = 0.03 mL The experimental values are 50.00 mL, 10.0 mL, 25.0 mL,…
Q: What type of samples can be analyzed using AAS?
A: **Since you have asked multiple questions, we will solve the first one for you. If you want any…
Q: The sample is dissolved in a mixture containing 10ml of distilled water and 20 ml of dilute…
A:
Q: 11. A 0.8000-g sample of iron ore containing 21.00% Fe is analyzed gravimetrically. If the final…
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Q: A 25.00-mL volume of 0.050 00 M imidazole was titrated with 0.125 0 M HNO3. Find Ve and calculate…
A: The Volume of Imidazole = 25 mL The Molarity of imidazole = 0.05 M Molarity of HNO3 = 0.125 M
Q: 12Electrodes of the first kind have poor precision The answer is either true or false 16Voltammetry…
A:
Q: Explain how a Gravimetric Analysis is performed.
A: Gravimetric analysis is a class of lab techniques used to determine the mass or concentration of a…
Q: 25.0 cm3 of sodium hydroxide solution is tritrated against 0.2 mol dm–3 hydrochloric acid until the…
A: Given, Volume of the NaOH = 25.0 cm3 Molarity of HCl = 0.2 mol/dm3 Volume of HCl = 27.5 cm3 At…
Q: What is the relative retention of the two solute?
A: relative retention of the two solute
Q: Why is it necessary to completely fill the rubber tubing of the stopcock with the solution before…
A: Titrations are done by using a buret. A burette is the volumetric measuring glassware carries marks…
Q: Zinc uranyl acetate, Magnesium uranyl acetate and Cobalt uranyl acetate, forms insoluble salts with…
A: zinc uranyl acetate, magnesium uranyl acetate, and cobalt uranyl acetate, forms insoluble salt with…
Q: -sodium chloride-congo red, btained when the filtrate is allov
A: We know that, Recrystallization is the process in which deformed grains of the crystal structure are…
Q: Which of the following statement of neutralization titration experiment is correct? 1. OBromocresol…
A: Titration is a typical quantitative chemical analysis laboratory method for determining the…
Q: A solid chloride sample weighing 0.09969 g required 18.25 mL of 0.05205 M AGNO3 to reach the…
A:
Q: The concentration of the "A" solution of propanol is 3.0×10-3 M, using GC method, the height of this…
A: Gas chromatography is analytical technique that is used to quantify the amount of component present…
Q: 6) Why EBT indicator is not used for the determination of Ca-hardness?
A: An indicator is a compound which combines with metal in complexometric titration and in the free…
Q: 6. 20 mL of tap water sample is taken in a conical flask and 1 mL of pH 10 buffer and 3 drops of…
A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: Describe what is done in a displacement titration and give an example.
A: In displacement titration a complex is formed as analyte displaces a reagent, and amount of…
Q: . A 1.2-gram sample of lanolin was treated with Wij’s solution and excess potassium iodide solution.…
A: GIVEN- Mass of lanolin sample(W)=1.2g Normality of sodium thiosulfate solution=0.1N Volume of…
Q: The Kjeldahl procedure was used to analyze 256 L of a solution containing 37.9 mg protein/mL. The…
A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…
Q: Why is the flame test used for the qualitative determination of Potassium ion and Sodium ion?
A: Flame test is used to identify a cation visually by the colour of the flame. Every element has its…
Q: Note the following indicators and their endpoints: Thymolphthalein (9.9) Resazurin (5.1) Phenol…
A: Indicators are the chemical species which show characteristic color in a solution for the…
Q: Which indicator is suitable for standardizing a potansium purmanganate solution using ammonium iron…
A: An indicator is used in a titration to indicate the end point of the titration. Generally an…
Q: Ethanol is needed as solvent when preparing phenolphthalein color indicator in volumetric…
A: Ethanol - class of alcohol containing 2 carbons and 1 alcoholic group and it is a industrial…
Q: ANALYSIS OF VINEGAR A 25.00 mL vinegar sample was diluted to 250-mL using a volumetric flask. A…
A: Dilution Formula :- When a solution of molarity M1 and volume V1 is diluted by adding water to a…
Q: Zinc uranyl acetate, Magnesium uranyl acetate and Cobalt uranyl acetate, forms insoluble salts with…
A:
Q: If the value of the blank solution is equal to 7.0 g/cm3 while the salt concentration is 9.7 g/cm3.…
A: The Seta Salt in Crude Analyzer is a robust and portable instrument for determining the chloride…
Q: n RPLC, The retention of a basic analyte in RPLC decreases as the mobile phase pH increases. True or…
A: Silica gel and alumina are highly polar so they interact strongly with polar compounds and solvent…
Q: The pNa of a mixture prepared by mixing 50 ml of 0.00063 M of NaCl and 300 ml of 0.00040 M in NagPO4…
A: Given, Molarity of NaCl = 0.00063 M Volume of NaCl = 50 mL = 0.050 L Molarity of Na3PO4 = 0.00040…
Q: Methods of Spectrophotometric Titration Coulometry Potentiometry Job's Plot Yoe and Jones Method…
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Q: 7. In the titration of 100 ml of acetic acid with. T.0 N NAOH, the following relative con- ductance…
A: Given: Volume of acetic acid = 100 mL Concentration of NaOH =1.0 N To calculate: The concentration…
Q: In which cases are the wet Electorstatic Precipitators used?
A: In which cases are the wet Electrostatic Precipitators used?
Q: Which of the following is not a component of the mobile phase in Ion exchange chromatography
A: Phase of mobility (Eluent)- Eluents for ion exchange chromatography are typically made up of an…
Q: What is the end point of colorimetry titration?
A: For determination of unknown quantity of a substance color observation is use in both cases of…
Q: d) If the uncertainty in one volume reading for the class A burette used is 0.03 mL., find the…
A:
Q: Using the Winkler method to determine the dissolved oxygen level in a water sample, which indicator…
A: We are to discuss which indicator is used in titration for winkler method to determine dissolved…
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: What is the minimum number of changes of 500 mL dialysate required to reduce a 100 mL sample at 1M…
A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…
Q: The color change of a chemical indicator requires an over-titration of 0.03 mL. Calculate the…
A: Use the following formula to calculate the percent relative error:
Q: For PbCl2, Ksp = 1.7 × 10−5 . What will occur if 250 mL of 0.12 M Pb(NO3)2 is mixed with 250 mL of…
A: Solubility product constant Ksp is an equilibrium constant that is defined as the product of the…
Q: Analytic chemistry. How to test the Na+ in the original solution? and NH4+?
A: In order to analyse the given unknown salt, generally sodium and ammonium salts are used as…
Q: What type of chromatogtaphy (RPLC, NPLC, HILIC, SEC, IEX) could be used for analyzing monosodium…
A: The answer is attached below-
Q: I'm working on a pre-lab report for chemistry regarding retention factors. The question asks what is…
A: Retention factors are related to chromatography experiment. Retention factor is the ratio of the…
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Q: Which type of indicator is used in Fajans-Fisher-Khodakov method adsorption indicator; irreversible…
A: The correct option is given in the next step:
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- true or false 1.,Carbonic acid, as a contaminant in the assay of sodium bicarbonate, may render the end point to be yellow. 2,.To have a balanced equation in the assay of sodium bicarbonate, the titrant should have a coefficient of one and the sulfate salt of sodium produced should have a coefficient of three. 3.When a weak alkali is titrated with strong acid, the indicator used is methyl red.4 4.Sodium bicarbonate is considered as the primary standard in its own assay. 5.When a strong alkali is titrated with a strong acid, phenolphthalein may be used.What makes bromocresol green and phenolphthalein suitable for the double-indicator process?I'm working on a pre-lab report for chemistry regarding retention factors. The question asks what is the maximum distance the indicator band will travel? Is the indicator band sometimes referred to as the indictor spot?
- Discuss the role of indicators for the titration procedure *ANALYSIS OF VINEGAR A 25.00 mL vinegar sample was diluted to 250-mL using a volumetric flask. A 50.00 mL aliquot portion of the dilute vinegar solution needed 35.45 mL of 0.1200 M NaOH to reach the phenolphthalein end point. Calculate the number of mmoles of acetic acid present in the 50-mL aliquot portion that was titrated.Why is the flame test used for the qualitative determination of Potassium ion and Sodium ion?
- 10. The color change of a chemical indicator requires an over titration of 0.03 mL. Calculate the percent relative error if the total volume of titrant is(a) 50.00 mL. (b) 10.0 mL. (c) 25.0 mL.(d) 30.0 mL.Which of the following correlations in the qualitative analysis experiment is incorrect? a. CO32- : evolution of H2 gas b. SCN- : formation of FeSCN2+ complex c. Zn2+ : precipitate is soluble in NaOH and NH3 d. NH4+ : red litmus paper turned bluewhy is it difficult to find the Ksp value for Mg(OH)2 during titration, compared to Ca(OH)
- Note the following indicators and their endpoints: Thymolphthalein (9.9) Resazurin (5.1) Phenol Red (7.4) Which indicator would be most appropriate to use for this lab if phenolphthalein was not available? Discuss the endpoint and equivalence point in your answer.For PbCl2, Ksp = 1.7 × 10−5 . What will occur if 250 mL of 0.12 M Pb(NO3)2 is mixed with 250 mL of 0.070 M NaCl?Determination of Water Hardness experiment was designed and suitable for bottled mineral water. What would you observe (and the changes in the result) if you performed complexometric titration based on the performed procedure on...a) distilled water b) tap water