1. Physical Change
A change that alters the form or appearance of a substance but does ________________________________________________________________
Example: ripping paper, melting ice

2. Chemical Change
A change in matter that produces _______________________________.
Example: burning paper, mixing chemicals (alka seltzer and water)

3. Solutions Solution = _______________________
________________________________________________________________
Example salt water

4. Solutions Uniform mixture = _________________
________________________________
Solvent = ________________________
Solute = _________________________
May change phase
Usually the smaller amount

5. Solutions
Soluble = if a substance _________________ in another substance it is soluble
Insoluble = if a substance _____________________ it is called insoluble
Dilute = __________________, lots of solvent, little solute
Concentrated = _____________________, lots of solute, little solvent
Saturated = when ___________________ can be dissolved in the solvent

6. Acids and Bases Acids – Compounds begin with______
Example: Citric Acid, HCl, H2SO4
Turns Litmus paper ___________________
Examples: ___________________________
Bases – Compounds end in __________
Example: NaOH, KOH
Turns Litmus paper _____________
Examples: ____________________________

7. Indicators and pH
Indicator = something that turns __________ in the presence of a certain substance
pH scale = a chart of acidity and basicity that goes from _____________

8. pH Scale
Strong weak neutral weak strong
Acid acid base base
Neutralization reaction: ________________________________________________________________________
Ex: HCl + NaOH -> H2O + NaCl
acid base water salt

9. Chemical Reactions
Chemical reaction = a process in which substances undergo chemical changes
All chemical reactions either take in or give off energy. The energy is usually in the form of heat.
Endothermic reaction: a reaction that __________________ in the form of heat.
Exothermic reaction: a reaction that __________________ in the form of heat.