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The separation and purification processes given below and the method used against them are given. Which or which of these pairings are correct? I. Brewing of tea - ExtractionII. Purification of water impurities - ChromatographyIII. Separating olive pomace from olive oil while producing olive oil-DecantationIV.Petroleum fractions obtaining - Ordinary distillationV. Obtaining essential oils and using them in perfume making - Water-steam distillationA. I, II, III, IVB. I, II, III, IV, VC. I, IV, VD. I, II, III, VE. I, II, V

IDENTIFICATION OF THE COMPONENTS OF THE MIXTURES. 1. A. Sodium Chloride - naphthalene -'Food Color Mixture 1. Sublimation 2. Adsorption with activated carbon 3. Dissolution with water then evaporation B. Sodium chloride - Sulfur - Sand Mixture 1. Dissolution with water then evaporation 2. Dissolution with toluene then decantation 3. Dissolution with toluene the evaporation

The separation and purification processes given below and the method used against them are given. Which or which of these pairings are correct? I. Brewing of tea - ExtractionII. Purification of water impurities - ChromatographyIII. Separation of olive pomace from olive oil while producing olive oil-DecantationIV.Petroleum fractions obtaining - Ordinary distillationV. Obtaining essential oils and using them in perfume making - Water-steam distillation

Which of the following could DECREASE the amount of the recovered crystals in the purification by recrystallization experiment? Collecting the recrystallized benzoic acid by filtration using a pre-weighed filter paper. Using a long-stemmed funnel in the hot filtration step. Cooling the filtered solution rapidly. Washing the recovered crystals using hot solvent. a. II, III b. II, IV c. II, III, IV d. I, II, III, IV

The goal of the recrystallization procedure is to obtain purified material with a maximized recovery. Which of the following will lower the percent recovery? L. In the solution step, an unnecessarily large volume of solvent is used. II. The crystals obtalned after filtration are not washed with fresh cold solvent before drying I. The crystals referred to in (II) are washed with fresh hot solvent. IV. Crystallization is accelerated by Immediately placing the flask of hot solution In an ice-water bath. V. A large quantity of decolorizing carbon is used. Select one: a. l, 11 b. I, IV clI, IV d. II, IV el, ,V

Make a seperate schematic diagram from provided procedures in photos

Which component(s) in the water-salt-potassium permanganate mixture is removed by distillation? Which test result confirms the removal of this component(s)? O a. Faintly colored water; it turns red litmus paper to blue O b. Water with potassium permanganate; the distillate is not colorless O c. Pure water; gives a negative result to the conductivity test O d. Water with dissolved salt; gives a positive result to the conductivity test

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1. Which among these is/are desirable properties for the type of precipitate required in gravimetric analysis? I. large particles III. known composition A. I only II. reactive with atmospheric constituents IV. small particles C. I & III В. I & II D. III & IV Е. I, П, I

In gravimetric analysis, volatile electrolyte is used in peptization step a. to form small nucleib. to easily dry precipitatec. to reprecipitate the analyteexplain please

Organic

a. Calculate the base saturation using the following given miliequivalent weights obtained from a 25g soil sample (a. Ca++= 2.23 m.e.; b. Mg++=1.32 m.e.; c. Na+= 1.98 m.e.; d. K+= 1.87 m.e.; e. H+= 1.27 m.e.; f. Al+++= 0.11 m.e.; g. NH4+= 2.3 m.e.; h. NO3-= 1.5 m.e.   b. Calculate the CEC (m.e./100g soil) using the following given miliequivalent weights obtained from a 25g soil sample (a. Ca++= 2.23 m.e; b. Mg++=1.32 m.e.; c. Na+= 1.98 m.e.; d. K+= 1.87 m.e.; e. H+= 1.27 m.e.; f. Al+++= 0.11 m.e.; g. NH4+= 2.3 m.e.; h. NO3-= 1.5 m.e.

A mixture of the two compounds shown below is dissolved in ether. Using the information given in the experiment, select all the correct statements regarding the extraction and isolation of the two compounds. lose 0000 X OH A. X can be extracted from the organic layer using sodium hydroxide. B. Y can precipitate out of the aqueous layer by the addition of sodium hydroxide to the salt of Y. C. X can precipitate out of the aqueous layer by the addition of sodium hydroxide to the salt of X. D. Y can be extracted from the organic layer using sodium hydroxide.

The water sample from the polluted estuary (number 4), was then subjected to a series ofinstrumental analysis like chromatography and spectroscopy to determine the exact identities of thepollutants. What kind of analysis are done to the unknown?a. Qualitative analysisb. Quantitative analysisc. Characterization analysisd. Fundamental analysis

15. What is the dilution factor for 40 uL of sample added to 200 uL of diluent?

Which error will lead to negative deviation from the theoretical Keq? a. cuvette was filled to the brim with the sample. b. cuvette was washed with sodium hydroxide instead of distilled water. C. standard with the highest concentration was used in autozero. d. cuvette was misplaced such that the opaque side faces the light

Data given...   Need help solving for unsolved questions.

1. These are balances that have a maximum loading of 10 to 30 g with a precision of 60.01 mgA. semi-microanalyticalB. MicroanalyticalC. MacrobalancesD. Triple Beam Balance2. Which type of curve is normally produced when plotting the change in the concentration of a specie of some function and the amount of reagent added?A. Titration curveB. Sigmoidal CurveC. Phase Transition curveD. Calibration curve3. In the dead dear case study, silver diethyldithiocarbamateforms a colored solution when it binds with arsenic, what do we call substance like silver diethyldithiocarbamate?A. Secondary standard reagentB. Precipitating agentC. Chelating agentD. Primary standard reagent

2. Look up the solubility data for benzoic acid in the solvent toluene. Is benzoic acid more or less soluble in toluene than water? Why? 3. What would be a disadvantage of using toluene in this experiment? J 2. Look up the solubility data for benzoic acid in the solvent toluene. Is benzoic acid more or less soluble in toluene than water? Why? 3. What would be a disadvantage of using toluene in this experiment?

Can you help me find the theoretical yield of precipitate in trial 1 & 2

2. a 10.00ml diluted chloride sample required 13.89 ml of 0.02014 M AgNo3 to reach the fajans endpoint. a. how many moles of Cl- ion were present in the sample b. what was the concentration of chloride in the diluted solution?

Answer all questions please

1. One of the methods of eliminating interferences, is by adding solvents to the solution in which components to be removed are soluble, which method is this? a. Complexation b. Extraction lon-exchange d. Precipitate С. 2. Which of the following properties of precipitates is desired in gravimetry? a. Large b. Pure С. Free of contaminants d. All of the choices

ne Calendar Badges All courses Course In extraction, usually we saturate the aqueous layer by salt in order to: Select one a Precipitate the organic solid To remove soluble impurities Oc Dry the organic layer (act as drying agent) Od. Break up emulsions TOSHIBA B/O A %24 465 6 1 7 V 8 A9 4 0 & **

6. The following are disadvantages of using filter paper in gravimetry, which is not included? a. React with strong acids and strong bases b. Break under mild stress c. Ashless filter paper is used d. Prevent use of suction 7. Which of the following can not be used to minimize supersaturation and thus used to crystalline properties? а. Нeating b. Using dilute solutions c. Rapid addition of the precipitating agent d. Air control

1.a) b)

Matt was heating his methanol solvent in an E. flask on a hot plate to use for recrystallization. The TAcame by and noticed he didn’t have a stir stick or boiling chip in the flask and told him to use one,please. Matt dropped a stick in the flask and suddenly the liquid exploded out of the flask. Oops! Tellme why that happened. What should he have done instead?

Explain in not more than 2 sentences. Help me

COMPARE the:   a. phase diagram of eutectic point between binary system of menthol and camphor and  b. phase diagram of the theoretical eutectic points. (handwritten diagram)   what were the factors that could have affected the results? provide recommendations on how to increase the accuracy/correctness of data

1. Discuss the following: a) direct method of weighing b) indirect weighing using the analytical balance. 2. Explain how suction filtration is carried out in the laboratory. Give the important points that must be observed in doing the process. 3. Explain why it is important to wash the precipitate. Can distilled water be used to wash all types of precipitates? 4. Discuss how to use a desiccator. When should a desiccant be replaced? Give 2 examples of substances used as desiccant.

Which of the following could result in a loss in yield in a mixed solvent recrystallization? i. Use of fluted filter paper in hot filtration ii. No heated solvent in the receiving flask iii.Rapid cooling iv. Both ii and iii