Solutes and Solubility
Investigation 1 – PostLab
Use the board to combine the data from each student group and complete Table F in your Student Data Record.
Note: Questions marked with a triangle (∆) are included to enrich your understanding. These questions do not appear in your SDR but may be used as additional discussion points during the PostLab.
Discuss the solubility of each of the compounds in water.
- ∆ Did all masses of each compound dissolve?
- ∆ Was the mass of each compound that did not dissolve the same or different?
Complete the Analysis Questions in your SDR then discuss them as a class.
- Compare the solubility of the three compounds in water.
- What was the highest concentration at which baking soda (NaHCO3) was soluble in water?
- What was the highest concentration at which salt (NaCl) was soluble in water?
- What was the highest concentration at which sugar (C12H22O11) was soluble in water?
- Between what masses is the saturation point of each of the compounds?
- Does a solute have a maximum concentration in a certain volume of water? Why or why not?
- Did the different solutes have the same solubility or a different solubility?
- Look at the chemical formulas for the compounds tested in the experiment. Do compounds composed of the same elements have the same solubility or a different solubility?
Complete the Focus Questions in your SDR then discuss them as a class.
- What affects the solubility of a solute?
- Is there a relationship between the concentration of a solution and the saturation point of a solute?