Concentration and Molarity Flashcards
1
Q
When is the concentration higher in a solution?
A
The concentration is higher when there is more solute in the solvent.
2
Q
How do you calculate concentration (M)?
A
c = n/V (M or mol/L)
3
Q
How do you calculate concentration when you don’t know the number of moles (unknown substance)?
A
Instead of number of moles, use mass of the sample so the unit is g/L.
4
Q
How do you calculate in ppm for the concentration?
A
ppm = 1mg/L. 1g = 1000mg and 1L = 1000mL.
5
Q
How are dilutions performed?
A
Dilutions are performed by a small volume of the original sample is transferred to a new flask with water added to it.
6
Q
What is the dilution formula (with concentration and volume)?
A
c1V1 = c2V2
