Print this web page to answer questions
Name ______________________________ Date
_______ Block _____
Part 1
Go to the following website: http://www.chemcollective.org/stoich/reaction_stoi.php
Watch the video. Answer the questions below.
1)
What are the two Greek words stoichiometry comes from? What does each word mean?
1.
___________________________________________________________
2.
___________________________________________________________
The following questions
are found below the video on the web site. You can click on the hint button for help!
2)
When you burn Mg in air, it reacts with oxygen (O2) to form MgO. Write the balanced equation for
this reaction.
____ Mg + ____O2 à ____MgO
How many moles of oxygen do you need to
burn one mole of Mg? _____
How many moles of Mg will react with one mole of oxygen (O2)? _____
3)
How many grams of oxygen do you need to burn 1.00 gram of Mg? (Note:
the balanced equation for this reaction was obtained in the previous question,) We will break this into the following steps:
How many moles are there in 1.00 grams of
Mg? ____________mol
Show work:
How Many moles of O2 are needed
to react with _____________ mol this amount of Mg?
Show work:
How many grams of O2 does this
correspond to, i.e. how many grams of O2 are needed to react with 1.00 gram of Mg? _____________
Show work:
4)
Mg also burns in carbon dioxide. In this case, Mg reacts with CO2 to produce MgO and solid carbon (C(s) ). How many grams of
CO2 are needed to consume 1.00 g of Mg? ____________
Show work:
Part 2
Go to the following website:
http://www.wisc-online.com/objects/index_tj.asp?objID=GCH1504
Answer the following questions as you advanced
through the slide show.
1)
What is the unit of equations? _____________________________________
2)
You know the product of neutralized 0.17 grams of HCl. Is this in the unit language of the balanced equation?
___________
3)
Complete the problem below
4)
What was the final answer? __________________g CO2
Part 3
Go to the following website: http://chemistry.csudh.edu/lechelpcs/genstoichiometrycs.html
You must get 5 problems correct. Print
the final page out to verify that you completed the requirement.
