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Questions and Answers
What is the purpose of a formulation?
What is the purpose of a formulation?
- To design useful products with carefully measured amounts of chemicals (correct)
- To test the quality of the mixed substances
- To separate mixtures of soluble substances
- To create a random mixture of chemicals
Why is paper chromatography used?
Why is paper chromatography used?
- To separate mixtures of soluble substances and identify the substances present (correct)
- To create mixtures of soluble substances
- To measure the melting point of a pure substance
- To test the quality of a substance
Why do pure substances have a sharp melting point?
Why do pure substances have a sharp melting point?
- Because they are quality tested
- Because they are not mixed with other substances (correct)
- Because they have carefully measured amounts of chemicals
- Because they contain impurities that affect the melting point
Which types of substances are often separated using paper chromatography?
Which types of substances are often separated using paper chromatography?
What can be inferred about the chemicals in a formulation?
What can be inferred about the chemicals in a formulation?
What is the common characteristic of substances separated using paper chromatography?
What is the common characteristic of substances separated using paper chromatography?
What is the mobile phase in chromatography?
What is the mobile phase in chromatography?
How can a paper chromatogram distinguish between pure and impure substances?
How can a paper chromatogram distinguish between pure and impure substances?
What can be used to identify unknown chemicals in chromatography?
What can be used to identify unknown chemicals in chromatography?
What happens if oxygen is present in a test tube?
What happens if oxygen is present in a test tube?
How can hydrogen be identified in a test tube?
How can hydrogen be identified in a test tube?
What does carbon dioxide not support?
What does carbon dioxide not support?
What are the two phases that chromatography relies on?
What are the two phases that chromatography relies on?
What is used to calculate Rf values in chromatography?
What is used to calculate Rf values in chromatography?
What does a lighted splint do when hydrogen is present?
What does a lighted splint do when hydrogen is present?
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