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# Stoichiometry of Solutions

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## Rachel Esquibel

on 8 February 2016

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#### Transcript of Stoichiometry of Solutions

Stoichiometry of Soltuions
Date Lecture/Activity Pg#
Objective:
I will use stoichiometry to determine the concentration of solutions in units of molarity

Agenda:
Stoich - volume

Chemcatalyst:
What is the molarity of a solution that has 20.43 g of CaCO3 in 200 mL of water?
Conversion Chart
Mass (g)
Moles
Atoms, Particles, molecules
Liters of Solution
Molar Mass
Molarity (mol/L)
Mass to Volume Steps
Step 1: Write a BALANCED EQUATION

Step 2: Convert Known from mass to moles (molar mass)

Step 3: Determine the mole ratio to convert from moles of Known to moles of Unknown

Step 4: Convert the Unknown substance from moles to volume in liters (molarity)
Template
Mass known
(g)
1 mol known
molar mass
known (g)
1 Liter
# moles
Molarity
What volume of a 0.5M NiSO4 solution is produced from 5g of Ni?
Practice Problems
Ni + FeSO4

--> Fe + NiSO4
Volume - Mass Steps
Step 1: Write a BALANCED EQUATION

Step 2: Convert Known substance from volume in liters to moles (Molarity)

Step 3: Determine the mole ratio to convert from moles of Known to moles of Unknown

Step 4: Convert the Known substance from moles to mass (Molar Mass)
Template
Known
Volume (L)
# moles
known
1 Liter
Molar Mass
known (g)
1 mol known
Practice Problem
What mass of Al is produced from 5L of a 0.50M AlCl3 solution?
2AlCl3 --> 2Al + 3Cl2
Volume - Volume Steps
Step 1: Write a BALANCED EQUATION

Step 2: Convert Known substance from volume in liters to moles (molarity)

Step 3: Determine the mole ratio to convert from moles of Known to moles of Unknown

Step 4: Convert the Unknown substance from moles to volume in liters (molarity)
Template
Known
Volume (L)
# moles Known
1 liter known
unknown
moles
known moles
1 liter of
unknown
# moles unknown
mole ratio
Practice Problem
What volume of a .30M Al is produced from 5L of a 0.50M AlCl3 solution?
2AlCl3 --> 2Al + 3Cl2
22. 04/08/14 Stoich of Solutions 27
unkown
mole
known
mol
unkown
mole
known
mol