The test for the presence of glucose with an aldehyde group is given to be found only in the open chain form but not in the cyclic form. This phenomenon is to be explained. Concept introduction: Carbohydrates are naturally occurring organic compounds. As the name implies carbohydrates are hydrates of carbon and have general formula of C X ( H 2 O ) Y . Basically, carbohydrates are polyhydroxy aldehyde and ketones , for examples, glucose and fructose. Glucose is a reducing sugar as it has an aldehyde group and its presence is detected by Tollen’s, Benedicts or Fehlings test. To determine: An explanation corresponding to the fact that the test for the presence of glucose with an aldehyde group is found only in the open chain form but not in the cyclic form.

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Answer 1

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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.

Chapter 22, Problem 106E

Interpretation Introduction

Interpretation: The test for the presence of glucose with an aldehyde group is given to be found only in the open chain form but not in the cyclic form. This phenomenon is to be explained.

Concept introduction: Carbohydrates are naturally occurring organic compounds. As the name implies carbohydrates are hydrates of carbon and have general formula of CX(H2O)Y . Basically, carbohydrates are polyhydroxy aldehyde and ketones, for examples, glucose and fructose. Glucose is a reducing sugar as it has an aldehyde group and its presence is detected by Tollen’s, Benedicts or Fehlings test.

To determine: An explanation corresponding to the fact that the test for the presence of glucose with an aldehyde group is found only in the open chain form but not in the cyclic form.

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There is an instrument in Johnson 334 that measures total-reflectance x-ray fluorescence (TXRF) to do elemental analysis (i.e., determine what elements are present in a sample). A researcher is preparing a to measure calcium content in a series of well water samples by TXRF with an internal standard of vanadium (atomic symbol: V). She has prepared a series of standard solutions to ensure a linear instrument response over the expected Ca concentration range of 40-80 ppm. The concentrations of Ca and V (ppm) and the instrument response (peak area, arbitrary units) are shown below. Also included is a sample spectrum. Equation 1 describes the response factor, K, relating the analyte signal (SA) and the standard signal (SIS) to their respective concentrations (CA and CIS). Ca, ppm V, ppm SCa, arb. units SV, arb. units 20.0 10.0 14375.11 14261.02 40.0 10.0 36182.15 17997.10 60.0 10.0 39275.74 12988.01 80.0 10.0 57530.75 14268.54 100.0…

A mixture of 0.568 M H₂O, 0.438 M Cl₂O, and 0.710 M HClO are enclosed in a vessel at 25 °C. H₂O(g) + C₁₂O(g) = 2 HOCl(g) K = 0.0900 at 25°C с Calculate the equilibrium concentrations of each gas at 25 °C. [H₂O]= [C₁₂O]= [HOCI]= M Σ M

What units (if any) does the response factor (K) have? Does the response factor (K) depend upon how the concentration is expressed (e.g. molarity, ppm, ppb, etc.)?

Answer 2

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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.

Chapter 22, Problem 106E

Interpretation Introduction

Interpretation: The test for the presence of glucose with an aldehyde group is given to be found only in the open chain form but not in the cyclic form. This phenomenon is to be explained.

Concept introduction: Carbohydrates are naturally occurring organic compounds. As the name implies carbohydrates are hydrates of carbon and have general formula of CX(H2O)Y . Basically, carbohydrates are polyhydroxy aldehyde and ketones, for examples, glucose and fructose. Glucose is a reducing sugar as it has an aldehyde group and its presence is detected by Tollen’s, Benedicts or Fehlings test.

To determine: An explanation corresponding to the fact that the test for the presence of glucose with an aldehyde group is found only in the open chain form but not in the cyclic form.

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Answer 3

Question

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.

Chapter 22, Problem 106E

Interpretation Introduction

Interpretation: The test for the presence of glucose with an aldehyde group is given to be found only in the open chain form but not in the cyclic form. This phenomenon is to be explained.

Concept introduction: Carbohydrates are naturally occurring organic compounds. As the name implies carbohydrates are hydrates of carbon and have general formula of CX(H2O)Y . Basically, carbohydrates are polyhydroxy aldehyde and ketones, for examples, glucose and fructose. Glucose is a reducing sugar as it has an aldehyde group and its presence is detected by Tollen’s, Benedicts or Fehlings test.

To determine: An explanation corresponding to the fact that the test for the presence of glucose with an aldehyde group is found only in the open chain form but not in the cyclic form.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

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.

Chapter 22, Problem 106E

Interpretation Introduction