Which statement is valid when the multiple extraction and single extraction is compared. The effciency of multiple extraction and single extraction is incomparable. Single extraction and multiple extraction have the same effciency Multiple extraction is more efficent than single extraction Single extraction is more efficient than multiple extraction

Which statement is valid when the multiple extraction and single extraction is compared. The effciency of multiple extraction and single extraction is incomparable. Single extraction and multiple extraction have the same effciency Multiple extraction is more efficent than single extraction Single extraction is more efficient than multiple extraction

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter8: Sampling, Standardization, And Calibration

Section: Chapter Questions

Problem 8.1QAP

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Define Extraction in chemistry ?
Question 11 Which statement is valid when the multiple extraction and single extraction is compared. Multiple extraction is more efficent than single extraction Single extraction is more efficient than multiple extraction Single extraction and multiple extraction have the same effciency The effciency of multiple extraction and single extraction is incomparable.
Flowchart example of Recrystallization
4. A fat sample with combination of acids contain standard hydrochloric acid for blank and sample with 8mL and 5mL respectively. The normality of the standard hydrochloric acid is 0.93N and the weight of the sample is 3 grams. Calculate the saponification value.
What are the types of gravimetric methods? Give an examples where each method is used in an analysis. What is particulate gravimetry? When do we use this technique?
Color BEFORE adding Color AFTER adding Intensity of color AFTER adding FeCl3 Test Tube # FeCl3 FeCl3 #1 (salicylic acid) clear lilac 100% #2 (commercial aspirin A) clear slightly pink 50% #3 (commercial aspirin B) clear lilac 95% #4 (aspirin from your clear pink 20% synthesis above) #5 (control) clear clear 0% Based on this data and the melting point of Aspirin, how pure is the synthesized product?
To which sample solution the spike will be add? the distillate>130C the mass standard the distilled <130C
Which of the following are properties of a good recrystallization solvent? Check all correct answers. Group of answer choices boiling point of solvent < melting point of crystals boiling point of solvent > melting point of crystals Crystals are soluble in solvent at low temperature and soluble at high temperatures. Crystals are soluble in solvent at high temperatures but insoluble or slightly soluble at low temperatures. Solvent boiling point is about room temperature. Impurities should be either soluble at all temperatures or insoluble at all temperatures. An abundant amount of crystals must be recoverable from the solvent.
Table 2: Absorbance Values of Standards and Unknowns. Sample Blank Standard Solution 1 Standard Solution 2 Standard Solution 3 Standard Solution 4 Standard Solution 5 Water Sample 1 Water Sample 2 Phosphate Concentration (in ppm) Y17 0 ppm 0.02 ppm 0.04 ppm 0.08 ppm 0.16 ppm 0.32 ppm Freeman Lake 0.001 0.325 0.292 0.413 0.315 0.039 0.054 0.049 Absorbance at 2= 690 nm Calculations: 1. Construct a phosphate standard curve in Excel by plotting concentration (in ppm) on your x-axis and Absorbance (unitless) on your y-axis for your known solutions. Label the axes on the graph and provide the curve with a title. Use a linear trendline to generate a best fit line to your data. Label the graph with the equation and the R" value. Insert your labeled graph in the space below. X
Determine each statement if it describes dissolution or disintegration. It is mainly affected by tablet hardness, presence of binders and fillers. The process of breaking down a substance that is not readily soluble May apply on solid, liquid and gaseous dosage forms. The process of breaking down a substance into tiny fragments. Involves the interaction between solute and solvent. Heat will majorly make the process faster The process closer to the absorption process. Tested using a machine with a basket rack holding six plastic tubes. The test for this process requires the sample to be tested for concentration of active ingredient over time. Usually only applies to solid dosage forms.
You have 100 mL of solvent available to do an extraction. Which will give a better separation?a. 1 extraction with 100 mLb. 2 extractions with 50 mLc. 5 extractions with 20 mLd. 3 extractions with 25 mL
fill in the blanks solution volume is 50/1000

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		The effciency of multiple extraction and single extraction is incomparable.
		Single extraction and multiple extraction have the same effciency
		Multiple extraction is more efficent than single extraction
		Single extraction is more efficient than multiple extraction