Chemistry help please?

Explain what is in a buffer. Discuss the function of a buffer. How will pH change when small amounts of acids or bases are added to the buffer solution?Chemistry help please?
a pH buffer is a substance added to a reaction to keep it at a certain pH. Otherwise in some reactions they change the pH themselves thus sometimes inhibiting the reaction. For example the enzyme lipase breaks down fats into fatty acids and glycerol. But the enzyme itself can only work in an alkali condition. So when it breaks down the fats,the fatty acids would change the pH to acidic and so the enzyme would no longer work- bile is the pH buffer in our body.



So back to your question. A pH buffer keeps the pH constant at the set pH wanted by the experimenter, despite any changes in the pH caused by the reaction.Chemistry help please?
I guarantee you that this question is answered in one or two paragraphs in your textbook. Look up buffer in the index. It all has to do with the percentage of Hydrogen ions involved, hence the term p for percentage, H for Hydrogen, or pH. Think of how many positive ions it would take to neutralize all of the negative ions / or vice versa. Kinda like doing addition with positive and negative numbers in the same equation. It's in the book. Look it up.