1. What happens when you stir a spoonful of sugar into hot water? The sugar will dissolve.
2. When sugar or another substance is dissolved in water, it disappears from view and forms
a homogeneous mixture with the wate
...
1. What happens when you stir a spoonful of sugar into hot water? The sugar will dissolve.
2. When sugar or another substance is dissolved in water, it disappears from view and forms
a homogeneous mixture with the water, also called a solution.
If you can’t see the sugar, how can you tell that it is there?
3. Does sugar dissolve more easily in hot water or cold water? Sugar dissolves more easily in
hot water.
To begin, check that Potassium nitrate is selected and
the Temp. of the water is 20 °C. Click OK.
1. In this solution, what is the solute? Potassium nitrate What is the solvent? Water
2. Click Add 10 g to mix 10 g of potassium nitrate into the water.
A. Did all of the potassium nitrate dissolve? Yes
B. How can you tell? You can’t see the potassium nitrate.
nitrate is selected.
Question: How do we find how much solute can be dissolved in a solvent?
2. Calculate: The concentration of a solution is equal to the mass of solute divided by the
volume of solvent. Units of concentration are grams per 100 milliliters (g/100 mL, or g/dL).
What is the concentration of this solution?
A. Did all of the solute dissolve? Explain how you can tell. No, because you can see the
potassium nitrate at the bottom of the beaker.
B. Based on the amount of solute added and the amount piled up on the bottom, how
many grams of solute dissolved in the water?
C. The solubility of the solution is equal to the maximum concentration of the solute.
What is the solubility of potassium nitrate in 20 °C water? 3.065 g/mL
4. Experiment: Click Reset, and select Sodium chloride. With the Temp. still set to 20 °C,
click OK. Add sodium chloride to the beaker until it starts piling up at the bottom.
much sodium chloride piled up at the bottom? .34 g
5. Apply: At 20 °C, how much sodium chloride could
B. How e dissolved into 2 L of water? 733.2 g
How much potassium nitrate could be dissolved into the same amount of water? 613 g
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