Warm-Up: Concentration and Solubility Curves

Front

What is molarity?

Back

Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution.

Front

How do you calculate the molarity of a solution?

Back

Molarity (M) = moles of solute / liters of solution.

Front

What is the molar mass of NaCl?

Back

The molar mass of NaCl (sodium chloride) is approximately 58.45 g/mol.

Front

What is a solubility curve?

Back

A solubility curve is a graph that shows the relationship between solubility and temperature for a given solute.

Front

At what temperature is NaBr saturated at 120 g in 100 g of water?

Back

At 70 degrees Celsius.

Front

How many grams of KClO3 are soluble in 200 g of water at 30ºC?

Back

20 grams.

Front

What is the relationship between concentration and taste in sweet tea?

Back

Higher concentration of sugar (solute) in sweet tea results in a sweeter taste.

Front

How do you determine the amount of solute in a solution?

Back

Use the formula: grams of solute = molarity (M) x volume (L) x molar mass (g/mol).

Front

What is the significance of a saturated solution?

Back

A saturated solution contains the maximum amount of solute that can dissolve at a given temperature.

Front

What is the effect of temperature on solubility?

Back

Generally, solubility increases with temperature for most solids.