Properties of Matter: Investigation 3 –
Instruct students to complete the Analysis Questions in their SDRs then discuss them as a class. Use the suggested responses below to guide students’ answers.
Note: Questions marked with a triangle (∆) are included to enrich your understanding. These questions do not appear in your SDR.
- Were all compounds soluble or miscible in water?
- Ask students to compare the formulas of the solid compounds that were soluble in water. Were the compounds composed of the same elements?
- Compare the formulas of the liquid compounds that were miscible in water. Were they composed of the same elements?
- ∆ Were there any compounds that were composed of the same elements but had different solubilities or miscibilities in water?
- ∆ Why can compounds composed of identical elements have different solubilities?
- What conclusions about the properties of compounds and elemental composition can you draw from your investigation?
Note: Remember, in Investigation 1, you studied other metals in addition to the two you explored in this Investigation.
- ∆ Based on the data that was collected, what would you expect to happen if the metals from Investigation 1 were added to an acid?
Complete the Focus Questions in your SDR then discuss them as a class.
- Do compounds composed of the same elements have identical properties? Explain your answer.
- Can compounds composed of different elements have similar properties?