1. Matter Notes (pt 4): Solutions, Chemical Equations & Law of Conservation
WCHS Chemistry

2. Can you filter out sugar from sugar water?
THINKER QUESTION!
Can you filter out sugar from sugar water?
NO!!! → the sugar is DISSOLVED!
Filtration only works with INSOLUBLE SOLIDS

3. Candle DEMO
What will happen to the mass of a candle after it has been lit for a while?
Prediction → Increase, Decrease, Stay the Same?
Initial Mass =

4. Solution vs. Aqueous Solution vs. Liquid
Liquid - A pure substance
Ex: water, mercury, ethanol
Solution - a homogeneous mixture composed of dissolved ions (something dissolved in something else)
Ex: Kool Aid, saltwater, chemicals we use in class.
Aqueous Solution - a water-based mixture
Symbol = (aq)
Solute - what is being dissolved
Solvent - what does the dissolving

5. Solution vs. Aqueous Solution vs. Liquid
Solubility - ability to dissolve
Soluble = CAN dissolve
Insoluble = CANNOT dissolve
Saturation - when no more of the solute can be dissolved
TT Challenge

6. Chemical Equations REACTANTS PRODUCTS YIELDS/PRODUCES/MAKES SOLID
NOT an equals sign!!!
Chemical Equations
SOLID
REACTANTS
PRODUCTS
Precipitate = the formation of a solid in a solution
What type of change is this?
CHEMICAL
How can I separate this?
FILTER!
Mass of Products = Mass of Reactants

7. Law of Conservation of Mass/Matter
Matter can’t be created or destroyed
Mass before = Mass after

8. Candle DEMO
What will happen to the mass of a candle after it has been lit for a while?
Prediction → Increase, Decrease, Stay the Same?
Initial Mass =
Final Mass =
DID WE JUST BREAK THE LAW!?!?!?!?!??!

9. SECTION 9 ! - Physical & Chemical Properties!!!
MSDS Sheets
SECTION 9 ! - Physical & Chemical Properties!!!