Chemistry test Molarity Flashcards
(11 cards)
1
Q
Solution Pyramid
A
N - number of moles
C - concentration (M) V - volume (L)
2
Q
Mass pyramid
A
Mass - kg
Moles - number of moles Molarmass
3
Q
How to calculate molar mass?
A
Example - NaOH
Na = 22.990
O = 16
H = 1
22.990+16+1 = 39.99
4
Q
What to find when you need to find Molarity (M)?
A
Concentration
5
Q
mmol / mL
mol / L
so then
A
mmol/ml = mol/L
ex: 2.5mmol/ml = 2.5mol/L
6
Q
Trick
A
find what you have and what you need to solve
C= ?
n =
V =
Mass =
7
Q
to get to from ml to L
A
Divide by 1000
8
Q
to get from L to ml
A
Multiply by 1000
9
Q
Grams to moles
A
grams ÷ by molar mass
10
Q
Moles to grams
A
x by molar mass
11
Q
Initial M x Initial Volume =
A
Final M x Final Volume
