Solubility Worksheet

Solubility WorksheetDefinition:

Solubility of a solution is the exact amount of solute required to form a saturated solution in a particular solvent at a certain temperature.

Solubility:

1 ppm = 1 mg/L

one parts per million = one milligram per liter

Solubility in water:

Substance20oC50oC

Salt36.0g/100mL36.7g/100mL

Water170g/100mL260g/100mL

Effect of temperature on Solubility:

The relationship between temperature and solubility is NOT simple.

For example:

SoluteTemperatureSolubility

Calcium acetate

Sodium chloridesame

Sugar

Interpreting Solubility Graphs:

Athe amount of solute needed to form a saturated solution increases with increasing temperature.

Bthe amount of solute needed to form a saturated solution decreases with increasing temperature.

Comit

Dthe amount of solute needed to form a saturated solution remains the same with increasing temperature.Pressure:

-Is another factor affecting the solubility of a substance.

-pressure has an effect on the solubility of carbon dioxide in water.

-when you open a bottle or can of pop, the gas solute comes out of solution due to a decrease in pressure.

Solubility Practice Question:

The following graph illustrates the solubility of salt (sodium chloride) water (H2O) at varying temperatures. Answer the questions using the graph.

i. How many grams of salt will dissolve in 100g of water at:

a. 10(C? = ________b. 25(C? = ________ (interpolate-estimate between to known values)

c. 65(C? = ________ (extrapolate-estimate outside of known values)ii. At what temperature will 8g of salt dissolve in 100g of water to form a saturated solution? = __________

iii. What relationship can you see between temperature and solubility from this graph?

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