What conclusion could you make if a positive test for any of the organic compounds occurred in the test tube containing only distilled water?

Answer: If a positive test for any macromolecules occurred in the test tube containing only distilled water. There might be a chemical added and may not be visible as one of the macromolecules that shows up when adding the chemical indicator.

Why do we need to identify organic compounds?

Organic compounds are important because all living organisms contain carbon. For example, the carbon cycle that includes the exchange of carbon between plants and animals in photosynthesis and cellular respiration. Organic compounds combine with metals to form organometallic compounds.

How do you identify organic compounds in a laboratory?

Structures of unknown compounds can be determined by comparing physical properties, performing functional group tests, and checking melting points of derivatives against those of known compounds reported in the literature. Solubility properties and chemical reactivity become apparent during these qualitative tests.

What is the purpose for using indicators in the organic compounds testing lab?

Simple chemical tests with substances called indicators can be conducted to determine the presence of organic compounds. A color change of an indicator is usually a positive test for the presence of an organic compound.

Which test substances did not test positive for any organic compound?

Which substances did not test positive for any of the organic compounds? Distilled water did not test positive for any of the organic compounds.

How can we test for organic molecules?

The table below shows the observations when a reaction occurs with organic compounds using certain tests….Testing for organic compounds.

Organic compound Alcohols
Test using bromine water Remains orange
Test using acidified potassium dichromate solution Solution changes from orange to green
Test using magnesium ribbon No fizzing

How many organic compounds are there?

Organic compounds (see below Organic compounds), so called because many of them were originally isolated from living organisms, typically contain chains or rings of carbon atoms. Because of the great variety of ways that carbon can bond with itself and other elements, there are more than nine million organic compounds.

How do you test for different organic compounds?

These tests can be used to distinguish between different organic compounds….Testing for organic compounds.

Organic compound Alcohols
Test using bromine water Remains orange
Test using acidified potassium dichromate solution Solution changes from orange to green
Test using magnesium ribbon No fizzing

Which test substances did not test positive for any organic compounds?

Which reagent is used to detect the presence of lipids?

Sudan III test
The Sudan III test is used to test detect lipids .

How are solubility tests used to identify organic compounds?

1. Solubility Tests. The solubility of an organic compound in water, dilute acid, or dilute base can provide useful information about the presence or absence of certain functional groups. A flowchart showing the sequence of solubility tests along with the appropriate conclusions is shown in Figure 1.

How to identify and characterize unknown organic compounds?

You will then apply what you have learned by characterizing unknown organic compounds in terms of their functional group and solubility behavior. The functional groups you will examine include amines, alcohols, carboxylic acids, alkenes, alkanes, and alkyl halides.

How are functional groups used in organic chemistry?

Because functional groups influence the physical, chemical, and spectral properties of an organic compound, a chemist can identify a compound’s functional groups by measuring certain physical properties, observing its chemical behavior with different classification reagents, and studying other spectral data.

How is solubility of 6M HCl used to identify compounds?

Solubility in HCl: Solubility in 6M HCl is a positive identification test for bases. Amines that are insoluble in pure water will be soluble in acid due to the formation of an ammonium chloride salt. Figure 1.