Essays on Aldehydes

Introduction

There are environmental chemical processes which require light to react. These processes are called photochemical reactions. Photochemical reaction is commonly initiated due to the absorption of solar energy or light. When molecules absorb energy in the form of light, the atoms are converted in a transient excited state (Larson & Weber, 1994). This transition state or excited has completely different physical and chemical properties with the initial state of the molecule. The excited states also have more tendencies to react since they are considered stronger acids and stronger reductants that the initial state of the molecule. The excited state of ...

The aim of the experiment was to identify the functional group of the two unknown organic compounds.

Method

Step 1: Test for acidity and basicity of the unknown by a universal indicator Step 2: Test for the capacity of the unknown to be oxidized by KMnO4 Step 3: Test for the capacity of the unknown to be reduced by a Tollen reagent Step 4: Test for the presence of a carbonyl group in the unknown using 2, 4-DNP Step 5: Test for the presence of an alcohol group in ...

Abstract

The purpose of this experiment was to characterize aldehydes and ketones using Tollen’s test and Iodoform test. It also aims to identify an unknown substance as well as determine whether glucose is an aldehyde or a ketone using the same tests. In order to achive these purposes, four test tubes where prepared for each type of test. For Tollen’s test, each of the tubes contained 1 drop of the analyte to which 1mL of the Tollen’s reagent was added. For the Idoform test, 4 drops of each substance was used, to which 2 mL of sodium hydroxide ( ...

Introduction

Pollutant gases tend to have an impact on both health and environment. Many nations rely on oil for energy use and advancement, hence imports every last bit of its oil and gas needs. Unfortunately, this has brought about dangerous effects upon the environment such as affecting the ozone, causes global warming, acid rain and smog. This may come about when fossil fuels are burnt to form these gases. The formation of toxic gases and their harmful impacts on human health and environment as well as biological effects by thermal pollution that is equivalent to the burning processes are being ...

Lab Report on Aldehydes and Ketones Experiment

Lab Report on Aldehydes and Ketones Experiment

The current experiment aimed at learning properties of some of the common aldehydes and ketones, as well as, the chemical tests used to distinguish the different classes. Both aldehydes and ketones have the same functional group known as carbonyl group C=O. In the aldehyde compounds, the carbonyl group is located at the end the structure with a general structure shown below (McNaught & Wilkinson, 1997). The carbonyl carbon is, therefore, the first carbon of the carbon chain. On the other hand, the carbonyl group in ketones is located anywhere on the carbon ...

The following paper describes the current developments and advances in the use and application of smart packaging technology in food packaging processes. The paper focuses on the application of the technology through various methods of smart food packaging, process designs, equipment used and the current applications. The paper also gives the various applications for the smart food packaging technologies.

Oxygen Absorbers

Oxygen absorbers/scavengers refer to smart packaging technologies that work by absorbing oxygen from foods while reducing oxygen metabolism in the packaged food (Latou et al. 2010). The process is designed to decrease oxidative rancidity and stop any unintended oxidation of ...