with slight Orange orange residue color precipitate Crystallized white solid Bright with a little yellow bit of color. orange color Yellow Red- precipitate with orange precipitate residue Orange Slight Yellowish yellow precipitate precipitate
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- Q. Determination of hardness by Clark's method.Chromatography question A student properly sets up a column chromatography experiment. Although the mixture is soluble i the mobile phase, the sample appears "stuck" at the top of the column and will not elute eregardless of how much solvet is pplaied. what could bee the cause of this issue and what could teh student try to achieve a successful separation?(11) Find Unknovong P Note: PfX Bothgive Posidive Test with ammonical AgNDa Solution. Hg S04
- FAlpOLSdkkCb8p7Lki9hSE-PEqyqO02a33Gom9YvugXuốb5uYkOPEUw/formResponse plify ern. Karely 1. Serena mixed two samples together: a gray solid that smells like flowers and a gray solid that smells like bleach. She analyzed the results and found two ending substances. One of the ending substances was a white solid. This ending substance is made up of the repeating group of atoms shown below. Which of the diagrams to the right shows the repeating groups of atoms that make up the samples Serena mixed together? Sample 1 Sample 2 An ending substance Sample 1 Sample 2 Properties: Bray solid mells like flowers Properties: gray solid smells like bleach Properties: white solid Sample 1 Sample 2 smells sour Sample Sample 1 Sample A. Diagram A B. Diagram B C. Diagram C O O O15.5 mg of Anthracene was dissolved in 200 mL of cyclohexane to prepare thestock solution. 10 mL of the stock solution was transferred to a 1000 mLvolumetric flask and made up to the mark with cyclohexane. The concentrationof the diluted Anthracene solution was measured by Fluorescence spectroscopyand showed to be 740 ppb. Calculate the % errorStandardization of a Solution A 50.00 mL aliquot portion of 0.01020 M KIO3 solution was transferred into a conical flask. After adding 2.0 g KI and 2 mL of 6M HC1, the mixture was titrated with 31.32 mL of the Na2S2O3 solution to the starch end point. Calculate the number of mmoles of IO3-. mmoles 103- How many mmoles of 12 was released after the addition of KI? mmoles I₂ How many mmoles Na2S2O3 reacted with the 12 produced? mmoles Na2S2O3- What is the molarity of the Na2S2O3 solution? M Na2S2O3 Write the half reaction representing the transformation of OC1- (hypochlorite ion) to Cl-(chloride) in acidic medium. Reduction Half Reaction: Write the half reaction representing the transformation of 1- (iodide ion) to 12 (iodine) in acidic medium. Reduction Half Reaction: Analysis of Household Bleaching Agent The composition of a commercially available household bleaching agent is advertised as 5% (w/v) NaOC1. . Calculate the number of mmoles of NaOCl present in 50 mL of the bleaching agent.…
- ing 0.03% w/w_of the same drug, who would be the percentage strength (wh) a of of the mixture? 23. A physician prescribes an suspension to contain 100 mg of corti- at n ophthalmic st sone acetate in 8 mL of normal saline solution. The pharmacist has on hand a (2.5% suspension of cortisone acetate in normal saline solution. How many milliliters of this and how many milli- le S liters of normal saline solution should b be used in preparing the prescribed sus- pension?gorq ww.Ps-3/9rie 24. R Benzalkonium ChlordaThe following tests are used for control of organic impurities in organic medicinal substances, except ... O a. Thin Layer Chromatography O b. Viscosity O c. pH of solution O d. SolubilityThe concentration of methylene blue in the sample is estimated through (select the correct) options: refractive index measurement (refractometry). turbidity measurement (turbidimetry). absorbance measurement (spectrophotometry). titration with 2% HCl solution.
- 49 3. In a preliminary experiment, a solution containing 0.083M X and 0.0666M S gave peak areas of A, = 423 and As = 347. In the analysis of an unknown sample, 10.0 ml of 0.146M S was added to 10,0 ml. of the unknown and the mixture was diluted to 25 ml. in a volumetric flask. Axin the mixture was 553 and As was 582. What is the concentration of X in the unknown?Please don't provid hand writtin solution....A spectrometer was used to measure the light absorbed by three standard solutions containing different concentrations of K2Cr207. The following data was obtained. [Cr] (ppm) Absorbance 5.1 0.162 10.0 0.320 14.9 0.486 The equation of the straight line generated using the method of least squares is: O a. y = 30.24x + 0.242 O b.y = -0.0086x + 0.0331 C. y = 0.0331x - 0.0086 O d.y = -0.1086x + 0.0231