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When 2.35g of Magnesium (OH)2 is added to 250.0mL of water the temperature of water raises from 20.5°C to 36.0°C. What’s the molar enthalpy of the solution?
A 5g carboxylic acid was neutralized by 30.10 mL of 0.1M NaOH, What is the percentage of carboxylic group (-COOH) in the given organic compound.
How to write in complete structure
1. You will be given an unknown compound for which you will need to find out the chemical structure of compound. This unknown gives positive tests for both N and S elements in their Lassaigne’s test and soluble in sodium bicarbonate solution with effervescence, it will also contain amine functional groups but may also contain other functional groups as well. The compound gives following chemical tests of the qualitative analysis. (02)
Table-1: Results for Functional Group Test
Functional Group Test
(+ve)/(-ve)
Functional Group Test
(+ve)/(-ve)
Bromine test
(+ve)
Fehling’s test
(-ve)
Baeyer’s test
(+ve)
Lucas Test
(-ve)
Bicarbonate test
(+ve)
Biuret test
(-ve)
Esterification test
(+ve)
Nitrous acid test
(+ve) (an azo dye is formed)
Tollen’s test
(-ve)
Carbylamine test
(+ve)
1. A 5g carboxylic acid was neutralized by 30.10 mL of 0.1M NaOH, What is the percentage of carboxylic group (-COOH) in the given organic compound. (01)
Synthesize ethyl ethanoate from 70g of the ethanoic acid. Calculate theoretical yield and percentage yield of the ethyl ethanoate if actual yield is 30g.
1.Background
2.Reagents/ Apparatus
3.Procedure
4.Applications
5.Precautions
A.Reaction and Mechanism
B.Calculations
C.Observations
D.Conclusion
What is the product of the nucleophilic subtitution reaction of CH3(CH2)2CH2Br with the iodide ions?
Why must mobile phases and all samples and standards be finely filtered before an HPLC experiment?
Differentiate between bulk sample, primary sample, secondary sample, subsample, laboratory
sample, and test sample.
Distinguish between UV-VIS spectrophotometry, IR spectrometry, and atomic spectroscopy
#340153 on Dec 2023