Question

lifework

1. how can we tell that this black ink is made out of several different substance?
2. if you have two different substances, what do you know will be true about their proper
3. if you have two different substances, what do you know will be true about their molecule

Explanation:

Step1: Analyze ink - separation principle

In chromatography (the experiment shown), different substances in the ink have different solubilities and affinities for the paper and the solvent. As the solvent moves up the paper, substances with different properties separate and form distinct bands or colors.

Step2: Answer question 1

When the black ink separates into different colors and bands during the chromatography process, it indicates that it is composed of several different substances. Each color or band likely represents a different chemical compound within the ink.

Step3: Answer question 2

Two different substances will have different physical and chemical properties such as solubility, boiling - point, melting - point, density, and reactivity. These differences allow them to be separated and identified in techniques like chromatography.

Step4: Answer question 3

Two different substances will have different molecular structures. Different molecular structures lead to different physical and chemical properties. For example, one substance may have a polar molecular structure while the other is non - polar, which affects their solubility in different solvents.

Answer:

1. During chromatography, the black ink separates into different colors and bands, showing it is made of several substances.
2. They will have different physical and chemical properties like solubility, boiling - point, etc.
3. They will have different molecular structures which result in different properties.