Chemistry 4-9-09 Intro to Stoichiometry
CHEMISTRY: Happy Thursday! Hey guys, here’s the lecture on the intro to stoichiometry. Today we did the first of the four stoichiometry problems: mole-mole problems. Major trouble with the audio today, so I’m posting the vodcast from honors last week. Have a wonderful Easter!
April 9th, 2009 at 8:34 PM
What is a mole ratio?
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April 9th, 2009 at 8:52 PM
nikkie, a mole ratio is the ratio of moles in a chemical equation yeah your welcome
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April 9th, 2009 at 9:25 PM
what’s stoichiometry?
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mary gatest talbot Reply:
April 9th, 2009 at 11:00 PM
jeeen… stoichiometry is what uses the ratio and proportion stuff. theres 2 kinds.. one is about composition and the other is about reactions (ratios of reactions and products) but they second one is the one we will use the most in our class i think
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April 9th, 2009 at 9:28 PM
when do you know if you are suppose to use molar mass or mole ratio or both?
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April 9th, 2009 at 9:44 PM
J-Hop
i think that the problem will always tell you which one to use so you wont have to choose you will always know
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April 9th, 2009 at 10:55 PM
Nikki
A mole ratio is how many moles are in one element of a compound that are shown proportionally to the moles of another element.
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April 9th, 2009 at 11:25 PM
what is the difference between molar mass and mole ratio?
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April 10th, 2009 at 9:56 AM
will this be hard for me to understand if i wasnt in class?
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April 10th, 2009 at 11:52 AM
how many types of problems are there for stiochiometry and hoe do you know which is which?
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April 10th, 2009 at 12:58 PM
there 4 types of problems
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April 10th, 2009 at 1:03 PM
in what kind of problems are we going to have to use molar mass?
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April 10th, 2009 at 3:24 PM
How do you work mole-mole problems
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April 10th, 2009 at 4:12 PM
what is stoichometry?
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April 10th, 2009 at 5:00 PM
what is the second step to work the problems?
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April 10th, 2009 at 5:21 PM
What do you do after you set up the Q formula? Which unit goes on the top?
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April 10th, 2009 at 5:23 PM
Elizabeth Anderson : Stoichmetry is simply the math behind chemistry. Stoichiometry provides the quantitative relationship between reactants and products in a chemical reaction.
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April 10th, 2009 at 5:32 PM
what is the moler ratio in a double replacement reaction.
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April 10th, 2009 at 7:09 PM
what is mole ratio used for?
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Brennon Chapman Reply:
April 14th, 2009 at 9:38 PM
They come from the coefficients and are used as conversion factors,
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April 10th, 2009 at 10:03 PM
what is stoichiometry?
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April 12th, 2009 at 1:24 PM
Macee:
No it will not be difficult for you to learn, its very simple.
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April 14th, 2009 at 10:48 AM
Beth Ann- You use mole ration when you need to convert A to B. The only way you can convert them is using the mole ratio, which is the coefficients of your balanced chemical equation.
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April 14th, 2009 at 11:45 AM
ashley: its the math used in chemical equations to got between mass and moles
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April 14th, 2009 at 3:12 PM
What is the actual yield of a product?
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Katherine Robinson Reply:
April 15th, 2009 at 9:10 PM
The actual yield is the actual amount the reaction produces in real life. This is always given. It is always less than the theoretical yield, the amount you calculate in a stoichioometry problem.
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April 14th, 2009 at 4:27 PM
Can you go from mass A straight to mass B?
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Jed Porter Reply:
April 14th, 2009 at 5:31 PM
Will:
No, I believe you must go from mass A to mole A; then to mole B and then to mass B.
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April 14th, 2009 at 9:34 PM
Macy-you write what you have and and what you need above your balanced chemical equation
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April 14th, 2009 at 10:36 PM
When doing Stoichiometry, do the steps change when you go from mass B to mass A or is the process the same?
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April 15th, 2009 at 10:59 AM
How do u know what numbers in the problems go in the road map thing before you set up the problem?
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Brittany Chisholm Reply:
April 15th, 2009 at 12:23 PM
Aniah: you dont put any numbers in the road map.
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April 15th, 2009 at 7:06 PM
autumn-there are four types of problems.
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April 16th, 2009 at 9:51 AM
How many basic steps are there for mole-mass stoicheometry problems?
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April 23rd, 2009 at 8:54 PM
What is stoichiometry?
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May 1st, 2009 at 11:57 AM
Stoichiometry is the calculation of quantitative (measurable) relationships of the reactants and products in a balanced chemical reaction.
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