Calculations with balanced chemical equations
How do you know if a chemical equation is balanced?
What is limiting reactant?
If a problem is asking you to find concentration, what does that mean?
That you need to find molarity
What are the units for molar mass?
grams/mol
What is a titration?
A laboratory technique to find the moles of a substance dissolved in an aqueous solution
If you have moles, how can you convert it into grams?
Multiplying by molar mass
How do you calculate percent yield?
Percent yield=(actual yield/theoretical yield)*100%
What is the formula for molarity?
DOUBLE POINTS IF YOU CAN EXPLAIN THE LITTLE TRIANGULITO
What is the formula for density?
DOUBLE POINTS IF YOU CAN EXPLAIN THE LITTLE TRIANGULITO
density=mass/volume
What is a standard solution?
A reactant with a known volume and concentration.
When do you use Avogadro's number?
When looking for atoms or when you need to convert atoms into moles
Imagina you have A and B in the same reactions. If you have moles of A and you want to convert it to moles of B, how do you do it?
Using the ratio because that's the only common thing between elements/compounds.
2.345 L
If you have a compound like SOCl2, how would you find the molar mass?
Looking at the periodic table, adding the molar masses for each element making up the compound. (S+O+Cl+Cl=118.97 g/mol)
What is a titrant?
The solution added during a titration
What is Avogadro's number?
6.022*10^23
How do you convert grams into moles?
Dividing by molar mass!
If you have 0.786 Liters, how many mL do you have?
786 mL
What number do you need to look at when looking for the ratio?
At the coefficients in the reactions
How can you find the volume of titrant that was used?
Final volume - initial volume