Unit 10 Worksheets
Pure Substances and Mixtures
|Substance |Element |Compound |
|strontium sulfate |insoluble |Sulfates are usually soluble, but strontium is an exception. |
|magnesium nitrate |soluble |Nitrates are soluble. There are no exceptions. |
|lithium sulfide |soluble |Sulfides are usually not soluble, but akali metals (lithium) are exceptions. |
|aluminum iodide |soluble |Iodides are usually soluble. Aluminum is not an exception. |
|silver bromide |insoluble |Bromides are usually soluble, but silver is an exception. |
|potassium chloride |soluble |Chlorides are usually soluble. Potassium is not an exception. |
Electrolytes
Determine which of the following compounds are electrolytes. Write dissociation reactions for the electrolytes.
|Compound |Ionic or |If ionic: |If ionic and soluble: |If electrolyte: dissociation reaction |Number |
| |Covalent? |soluble or |electrolyte | |of ions |
| | |insoluble? | | | |
|CaBr2 |ionic |soluble |electrolyte |CaBr2[pic]Ca2+ + 2 Br- |3 |
|KOH |ionic |soluble |electrolyte |KOH[pic]K+ + OH- |2 |
|AgI |ionic |insoluble | | | |
|Al2(SO4)3 |ionic |soluble |electrolyte |Al2(SO4)3[pic]2Al3++3SO42- |5 |
|H2O |covalent | | | | |
Fill in the Blank:
1. _____________ will determine what substance will layer on top of another substance for
_______________ liquids
2. ___________ liquids are able to dissolve freely in one another
3. ___________ are insoluble solids that collect at the bottom of a solution
4. Water is different from other substances because it is ______ dense as a liquid and _____ dense as a solid
5. Water is known as the _________ solvent because it’s polarity allows so many substances to dissolve in it
6. The cohesion of water molecules creates a condition called _____________________
7. ___________ means that there are partial positive and partial negative charges in the molecule
8. Water is found in groups of 5 because of _______________
-----------------------
Density Miscible More Universal Polarity
Immiscible Precipitates Less Surface Tension Hydrogen Bonding
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