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Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

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Page 1: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

Stoichiometry Time!

Let’s get started!P2 Mrs. Basile’s class

Page 2: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

The Problem 21. What mass of

is produced when 82.4g of Rb and 11.6g of

ORb2

2O

Page 3: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

The Solution

Which one is balanced?

4RbO2+2Rb2O

4Rb+O22Rb2O

Page 4: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

*Ding* Correct! This equation is balanced!

On to the next question…

Page 5: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

The Solution Part 2 What is the correct

answer for 82.4g Rb?

ORB221g Rb2O90.11

g

9.0gRb2O

ORB2

Page 6: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

The Solution Part III

Which is the correct answer of 11.6g of O2?

123.4g Rb2O135.53g Rb2O

4g O2

Page 7: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

*Ding* Correct! 11.6gO2 x

2

2

32

1

gO

molO x

21

22

molO

OmolRbx

OmolRB

OgRb

21

294.186

=32

294.18626.11 OgRbxx= 32

00.4337 = 135.53gRb2O

On to the last part…

Page 8: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

The Last Part

So which element is the limiting reactant, everybody?

RbO2

Page 9: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

*Ding* Correct Yay! You correctly noticed that

90.11g of Rb2O was smaller than 135.53g of Rb2O. Therefore, Rb is the limiting reactant! Hooray !!!!

Page 10: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

*Beep* FAIL! >:(

Really? We’ve gone this far and you can’t see that 135.53g of Rb2O is larger?

Go back, please

Page 11: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

*Beep* NO! >:(

This is the wrong answer. Think back to what I told you before. Is it balanced?

No!Back!

Page 12: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

*Beep* INCORRECT! >:(

This is the wrong answer! Go back to your notes on the balanced slide, and redo the problem.

Go back!

Page 13: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

*Ding* Correct 82.4g Rb x

gRB

molRb

47.85

1

OmolRb

OgRbx

molRb

omolRbx

21

294.186

4

22=

447.85

94.18624.82

x

xx

=88.341

71.30807 = 90.11gRb2O

Good Job! On to next question…

Page 14: Stoichiometry Time! Let’s get started! P2 Mrs. Basile’s class

*Beep* WRONG! >:(

The equation is not balanced

Go back, fool!