How could you separate zinc chloride from SiO2?Use the editor to format your answer Why is the NaCl extracted with water three times asopposed to only once?

Zinc chloride can be separated from the mixture of the silicon dioxide by dissolving the silicon…

Answered: How could you separate zinc chloride…

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter12: Isopentyl Acetate (banana Oil)

Section: Chapter Questions

Problem 2Q

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In order to analyse mercury with AAS, which method will you prefer? Explain this method in detail.
i. Why Redox active gels are considered as ideal candidate to tune shapes, color, solubility, or display sol-togel transitions? Explain it with one example.
Explain the principles behind the colorimetric methods used in each electrolyte
In the Mohr Method Determination of Chloride, why must the titration be in neutral condition to be carried out? What will be the side reactions if it is done in basic as well as acidic conditions?
Why is neutral medium or slightly alkaline medium more suitable for Mohr's method and What are the color changes at the end point?
Using a spectrophotometric technique, the phosphorus content in a mineral will be prolonged. The procedure used is described below: 8.35 g of sample are dissolved and treated so that all phosphorus is converted to the blue orthophosphate complex and made up to volume with distilled water end of 100 ml. The transmission of the resulting solution is 30.6%. If the orthophosphate standard solution of sodium, which is treated in the same way, and which has a final concentration of 2.467x10-4 M, gave a transmittance of 20.5%, calculate the phosphorus content in the driven sample in ppm Na3PO4.
For each of the following experiments, try to identify the major probable sources of random and systematic errors, and consider how such errors may be minimized: 1. The iron content of a large lump of ore is determined by taking a single small sample, dissolving it in acid, and titrating with ceric sulphate after reduction of Fe (III) to Fe (II). 2. The same sampling and dissolution procedure is used as in (a) but the iron is determined colorimetrically after addition of a chelating reagent and extraction of the resulting colored and uncharged complex into an organic solvent. 3. The sulphate content of an aqueous solution is determined gravimetrically with barium chloride as the precipitant.
(a) To optimize the assay's sensitivity to glycine, at what wavelengths should the excitation and emission monochromators be set, and what should the pH of the solution be? (b) To produce the shape of the pH versus relative intensity curve, what is the smallest number of species must be present in the solution and how many are fluorescent? Why?
water sample is determined through a spectrophotometric method based on the reaction of phosphate ion with molybdate ion, by originating a yellow complex. Calibration standards (P1 to P5) are prepared as follows: different volumes of a 102.2 mgL1 phosphate solution are added to several 100 mL volumetric 1. The content of phosphate in a flasks. Then, 10 mL of diluted HCI, 10 mL of 1% molybdate ion solution, and 10 mL of 0.75% oxalic acid solution are added to every flask, and finally water is added up to the volumetric mark. Samples are prepared in the same way, adding different sample volumes instead of phosphate standard solution. Absorbance of all solutions is measured at 360 nm, and the following data are obtained: Added volume Absorbance at 360 nm P1 2a 0.109 P2 5a 0.249 P3 10a 0.501 P4 15a 0.748 Р5 20a 1.008 Blank 0.000 Sample 20b 0.624 (a) mL of 102.2 mg L' phosphate standard solution. (b) mL of sample Calculate the concentration of phosphate in the water sample expressed in mg…
Kindly answer question a & b
In a reaction involving the iodination of acetone, the following volumes were used to make up the reaction mixture: 5mL4.0M acetone+10mL1.0M HCl+10mL0.0050MI2+25mLH2O a. How many moles of acetone were in the reaction mixture? Recall that, for a component A, moles A=MAV, where MA is the molarity of A and V is the volume in liters of the solution of A that was used. __________ moles acetone b. What was the molarity of acetone in the reaction mixture? The volume of the mixture was 50 mL, 0.050 L, and the number of moles of acetone was found in Part a. Again, MA=moles ofAV of soln. in liters __________ M acetone c. How could you double the molarity of the acetone in the reaction mixture, keeping the total volume at 50 mL and keeping the same concentrations of H+ ion and I2 as in the original mixture?
Explain why in Mohr's method neutral medium should be used in titration of AgNO3?

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