to do stoichiometry
DESCRIPTION
To Do Stoichiometry. To do Stoichiometry is easy first find a problem !. What mass of IF 5 is produced when 4.687g of SF 4 reacts with 6.281g of I 2 O 5 to produce IF 5 and SO 2 ?. What is the first step?. Convert Atoms to molecules Examine the letters on the page Balance the equation. - PowerPoint PPT PresentationTRANSCRIPT
To Do Stoichiometry.
To do Stoichiometry is easy first find a problem!
What mass of IFWhat mass of IF5 5 is produced is produced when 4.687g of SFwhen 4.687g of SF4 4 reacts reacts
with 6.281g of Iwith 6.281g of I22OO5 5 to produce to produce IFIF5 5 and SOand SO22??
What mass of IFWhat mass of IF5 5 is produced is produced when 4.687g of SFwhen 4.687g of SF4 4 reacts reacts
with 6.281g of Iwith 6.281g of I22OO5 5 to produce to produce IFIF5 5 and SOand SO22??
What is the first step?A. Convert Atoms to molecules
B. Examine the letters on the page
C. Balance the equation
If you said balance the equation you are right!SF4 + I2O5 -> IF5 + SO2
Balance it to:5SF4 + 2I2O5 -> 4IF5 + 5SO2
Sorry that answers wrong
Back to question
Next Step!Remember that you put what needs
to be canceled on the bottom and what your trying to find on the top.
So what are we trying to find and canceling out:
A.moles, gramsB.funds, peopleC. Atomic mass, grams
WRONG!
Back to question
Get the mass of: SF4 = 108.065
I2 O5 = 333.8
IF5 = 221.9
How would you find this?Just take the atomic mass and multiply it
bywhat ever the coefficient is attached to the
element in the problem then add um all up!!
Lets start with 4.687g SF4
4.687g
gSF 108.065
SF 1mol
4
4
Cancel Grams and move on to moles
4
5
SF 5
IF 4
mol
mol
Test your memory!
For the last problem we need to know the total amount of IF5 in order to find the grams
A. 667.7B. 221.9C. 78.09
Were you listening?? Smh :/
Back to the question!
Divide or multipl??
Multiply top and then bottom:Top 4.687 x1x 4 x 221.9
Bottom 108.065 x 5 x 1
So here we are so far….
4.687g
4
4
065.108
1
gSF
molSF
4
5
5
4
molSF
molIF5
5
IF 1mol
IF g9.221
This is it!
221.9 divided by 540.325 = 7.7SOOOOO7.7 IF5 is produced when 4.687g of SF4
Now 6.281g of I2 O5
5SF4 + 2I2O5 -> 4IF5 + 5SO2
Remember* grams _______ x ________x________
molAgramsA
molB
molA molBgramsB
A different look at it
5
5
52
5
52
2
IF 1molgIF 221.9
OI 2molIF 4mol
OI 333.8g
OI 1 5mol
No No No you try it!
Here WE GO!
A different look at it
5
5
52
5
52
2
IF 1molgIF 221.9
OI 2molIF 4mol
OI 333.8g
OI 1 5mol
Did you get-?
A. 5575.0156 grams IF5
B. 8.35 grams IF5
C. 768 mol IF6
*hint: Round!
Check your math
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