Concentration/Solubility Curves
Review….
What is the concentration in ppm of a solution
made of 4g of Sucrose dissolved in 200g of
water?
I have a 15% Salt in water solution that has a
total mass of 100g, what is the mass of the
dissolved Salt?
Solubility Curve
To show the amount of a substance that we
can dissolve at specific temperatures we use
a solubility curve.
The line represents a saturated
solution.
Below the line represents an
unsaturated solution.
Solubility Curves Cont.
1.) What kind of solution
would you have if 30g
of NaCl was dissolved
in 100g of water at
30°C?
Solubility Curves Cont.
2.) What kind of solution
would you have if 30g
of KNO3 was dissolved
in 100g of water at
20°C?
Solubility Curves Cont.
What kind of solution
would you have if 50g
of KNO3 was dissolved
in 100g of water at
20°C?
Solubility Curves Cont.
What kind of solution
would you have if you
PUT 50g of KNO3 into
100g of water at 20°C?
Solubility Curves Cont.
5.) What mass (in grams)
of NaCl will dissolve in
100g at 40°C?
Solubility Curves Cont.
6.) What mass of KCl will
dissolve in 100g of
water at 40°?
Solubility Curves Cont.
7.)If we dissolve 25g of
KCl in 100g of water at
40°, how many
additional grams of KCl
must be added at this
temp to form a
saturated solution?
Solubility Curves Cont.
8.) What is the minimum
mass of 40° water
needed to dissolve 20g
of NaCl?
Lab
Solubility Curves Cont.
9.) How much NaCl will
dissolve in 350g of
water at 70˚C?