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Tutor profile: Shelby B.

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Shelby B.
Recent College Graduate, Laboratory Analyst
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Questions

Subject: Physical Chemistry

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Question:

How can you speed up or slow down a reaction?

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Shelby B.
Answer:

The rate of a reaction can be changed by the temperature at which the reaction is run. For example, reactions can be expedited by simply raising the temperature of the reaction itself.

Subject: Chemistry

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Question:

What is a buffer and how do you choose the correct buffer for your experiment?

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Shelby B.
Answer:

A buffer is a solution that will resist pH change when acid or base is added to it. It is best to choose a buffer that is close to the pH of your working experiment.

Subject: Basic Chemistry

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Question:

What is a colloid? Can you give an example?

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Shelby B.
Answer:

A colloid is a mixture in which one one substance is suspended in another. This can come in many combinations. My favorite example is cheese. Cheese is considered a liquid in a solid, where the liquid is the solute and the solid is the solvent.

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