Learning Target:
Students will be able to compare and contrast pH and molarity for acids and bases.
Students will calculate both pH and molarity.
Students will be able to compare and contrast pH and molarity for acids and bases.
Students will calculate both pH and molarity.
Acids and Bases AND pH (WSQ) |
Important Vocabulary
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To understand safety in the lab, you must understand what acids and bases are and what to do if you get them on yourself during a lab. Because acids and bases chemically react easily, we will use them in most labs done in this class. Below is a chart of the pH of acids and bases with examples and hydrogen ion concentration. The higher concentration of hydrogen ions makes it a lower pH (acid) and higher concentration of OH ions make a higher pH (base).
Buffers are acids and bases that are weak that naturalize stronger acids and bases. Vinegar is a acid buffer and baking soda is a base buffer. What that means is that there will always be a buffer available during lab If you were to get a BASE on your hand you would use the "opposite" buffer (which is vinegar). If you were to get an ACID on your hand you would use the "opposite" buffer (which is baking soda).
Buffers are acids and bases that are weak that naturalize stronger acids and bases. Vinegar is a acid buffer and baking soda is a base buffer. What that means is that there will always be a buffer available during lab If you were to get a BASE on your hand you would use the "opposite" buffer (which is vinegar). If you were to get an ACID on your hand you would use the "opposite" buffer (which is baking soda).
Molarity of AcidsMolarity refers to the CONCENTRATION of the solution (HOW MUCH WATER IS IN IT?). If something has a high molarity that means it doesn't have very much water. If a solution has a lower molarity, that means it has a lot of water. I like to use the example of Kool-Aid. Think of the concentration of the Kool-Aid if it is really strong. Now think of the concentration of really weak Kool-Aid. Understand?
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M(acid 1) x V(acid 1) = M(acid 2) x V(acid 2)
The equation above allows us to calculate the molarity of either an acid or a base. In the lab that you will be doing, you must determine the molarity of a solution using this equation