Presentation is loading. Please wait.

Presentation is loading. Please wait.

Chemical vs. Physical. Chemical Change involves breaking and/or making Bonds.

Similar presentations


Presentation on theme: "Chemical vs. Physical. Chemical Change involves breaking and/or making Bonds."— Presentation transcript:

1 Chemical vs. Physical

2 Chemical Change involves breaking and/or making Bonds

3

4

5

6 Physical Change doesnt involve breaking and/or making Bonds

7

8

9

10

11

12

13 Dissolving Ionic Compounds is a little bit of a Gray area, but is considered to be a Physical Change.

14 Physical Change doesnt involve breaking and/or making Bonds In General, Physical Changes are easily reversed, Chemical Changes are not!

15 Chemical Change involves breaking and/or making Bonds

16 In the Lab, you cant see the bonds being broken and/or made! How do you tell if a change is a Chemical Reaction or a Physical Change?

17 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change

18 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change 2.Heat and/or Light Produced

19 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change 2.Heat and/or Light Produced 3.Gas Produced

20 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change 2.Heat and/or Light Produced 3.Gas Produced 4.Precipitate Formed

21 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change 2.Heat and/or Light Produced 3.Gas Produced 4.Precipitate Formed

22 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change 2.Heat and/or Light Produced 3.Gas Produced 4.Precipitate Formed-Usually see clear solution turn cloudy before solid settles.

23 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change 2.Heat and/or Light Produced 3.Gas Produced 4.Precipitate Formed-Usually see clear solution turn cloudy before solid settles. Be aware of Physical Changes that can APPEAR to be Chemical!

24 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change – Watch for Color Mixing 2.Heat and/or Light Produced 3.Gas Produced 4.Precipitate Formed-Usually see clear solution turn cloudy before solid settles. Be aware of Physical Changes that can APPEAR to be Chemical!

25 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change – Watch for Color Mixing 2.Heat and/or Light Produced – Some Physical Changes produce heat 3.Gas Produced 4.Precipitate Formed-Usually see clear solution turn cloudy before solid settles. Be aware of Physical Changes that can APPEAR to be Chemical!

26 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change – Watch for Color Mixing 2.Heat and/or Light Produced – Some Physical Changes produce heat 3.Gas Produced – Watch for release of trapped gas, or boiling 4.Precipitate Formed-Usually see clear solution turn cloudy before solid settles. Be aware of Physical Changes that can APPEAR to be Chemical!

27 4 OBSERVATIONS that Tend to indicate that a change is Chemical: 1.Color Change – Watch for Color Mixing 2.Heat and/or Light Produced – Some Physical Changes produce heat 3.Gas Produced – Watch for release of trapped gas, or boiling 4.Precipitate Formed- Adding a solid that doesnt dissolve doesnt count! Be aware of Physical Changes that can APPEAR to be Chemical!

28 Chemical Properties (AKA Will they react?) Sodium reacts with water Gold does not react with acids Hydrogen reacts with oxygen Copper does not react with salt (NaCl)

29 Physical Properties: Can be measured without trying to react the substance. Sodium is malleable Gold has a density of 19 g/mL Hydrogen is colorless Copper conducts electricity

30 Physical Properties: Can be measured without trying to react the substance. Sodium is malleable Gold has a density of 19 g/mL Hydrogen is colorless Copper conducts electricity Note that color is a Physical Property, but a color CHANGE is an indication of a Chemical Reaction.


Download ppt "Chemical vs. Physical. Chemical Change involves breaking and/or making Bonds."

Similar presentations


Ads by Google