a) Aldehydes are easily converted (oxidised) to form carboxylic acids.Ketones, on the other hand, do not oxidise to form carboxylic acids.Suggest a reason why this is so. An experiment was conducted to determine the concentration ofglucose in Macadamia flower nectar.100 grams of Macadamia flowers was extracted with 500 mL of water.Using an Optical Rotation detector a standard curve was produced usingpure glucose.Optical Rotation Angle (OR)1.61.41.210.80.60.4Glucose Concentration (mM) vs Optical Rotation AngleOR = 0.0341 [mM glucose ] +0.0017.510152530Glucose Concentration (mm)20354045A sample of nectar extract was analysed on the optical rotation detectorand an angle of 0.192⁰ was measured.Determine the concentration of glucose in the solution using theequation of the standard curve graph. Knowing the molecular weight of glucose is 180 grams per moledetermine the concentration of glucose in the 100 grams of macadamiaflowers as grams glucose per gram macadamia flowers.

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Answered: Aldehydes are easily converted…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter28: Atomic Spectroscopy

Section: Chapter Questions

Problem 28.2QAP

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a) Aldehydes are easily converted (oxidised) to form carboxylic acids.
Ketones, on the other hand, do not oxidise to form carboxylic acids.
Suggest a reason why this is so.

An experiment was conducted to determine the concentration of
glucose in Macadamia flower nectar.
100 grams of Macadamia flowers was extracted with 500 mL of water.
Using an Optical Rotation detector a standard curve was produced using
pure glucose.
Optical Rotation Angle (OR)
1.6
1.4
1.2
1
0.8
0.6
0.4
Glucose Concentration (mM) vs Optical Rotation Angle
OR = 0.0341 [mM glucose ] +0.0017.
5
10
15
25
30
Glucose Concentration (mm)
20
35
40
45
A sample of nectar extract was analysed on the optical rotation detector
and an angle of 0.192⁰ was measured.
Determine the concentration of glucose in the solution using the
equation of the standard curve graph.

Knowing the molecular weight of glucose is 180 grams per mole
determine the concentration of glucose in the 100 grams of macadamia
flowers as grams glucose per gram macadamia flowers.

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

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