Chpt. 12, Stoichiochemistry Flashcards Preview

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Flashcards in Chpt. 12, Stoichiochemistry Deck (6):
1

stoichiometry

the branch of chemistry that figures out how much of something can be made, or how much is needed, during a rebellion

2

limiting reagent

the portion of a reaction that is used up first

3

percent yield

% yield = (amount of actual value for product) / (amount predicted by chemistry)

4

calculations

when doing equations in stoichiochemistry, a t-chart is generally used; although there are many different types of ways you could potentially do it, the basic idea is that anything on the bottom can cancel out anything on the top, and you have to arrange the equation in such a way that it ultimately cancels out to equal the value of what you want, expressed in the units that you need it expressed in

5

experimental error

Experimental error will occur in any chemical reaction that a human being sets up; there has never been a flawless experiment before. Even if the percent yield equals 100%, that doesn't mean it was successful, it just means that the net value in terms of mass of all the various flaws combined equaled what the theoretical yield should actually be.

6

types of error

human error = when people screw stuff up

systemic error = a problem with procedure; in other words, human error as manifested in the instructions that you are following, or that you give yourself

instrumental/black box error = when equipment is messed up

unknown error = error that you do not know the origin of