1 / 13

Warm Up

Warm Up. What is a chemical reaction? How do you know there has been a chemical reaction?. Notes:. Chemical reactions- are when 2 or more COMPONDS combine chemically or break chemical bonds.

livvy
Télécharger la présentation

Warm Up

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Warm Up What is a chemical reaction? How do you know there has been a chemical reaction?

  2. Notes: • Chemical reactions- are when 2 or more COMPONDS combine chemically or break chemical bonds. • Chemical reactions are written using the Element Symbols and any possible subscripts or coefficients.

  3. Reactants → Products • The chemicals go into a reaction are called reactants.  • The chemicals that come out are called products. • The arrow (→) means “yields” or “makes” or “produces”.

  4. Let’s Label: 2Na + Cl2 2NaCl reactants products

  5. Coefficient 2Na + Cl2 2NaCl reactants products

  6. Coefficient 2Na + Cl2 2NaCl Coefficient is the BIG number in front. the number of molecules that are needed to balance it

  7. More details… • Examples of word equations are Hydrogen + Oxygen → Water Sodium + Chlorine → Sodium chloride Zinc + Hydrochloric acid → Zinc chloride + hydrogen gas • In all chemical reactions mass is conserved as reactants are transformed into products by the rearrangement of atoms.

  8. Let’s watch a chemical reaction that is tasty! • http://www.sciencekids.co.nz/videos/chemistry/chocolate.html

  9. What does a chemical reaction look like? Reactants: Carbon- 3 Hydrogen- 8 Oxygen – 10 Is the same # of atoms on the Product side?

  10. How do you say it? • 2 HCl + 2 Na → 2 NaCl + H2 • You would say "two HCl plus two Na yields two NaCl and H two."

  11. Let’s practice: • Work with your partner to complete the worksheet • Keep it! We will check it!

  12. Bill Nye’s chemical reaction video! • http://www.youtube.com/watch?v=PlwuxpMh8nk

  13. Homework: • Do your very best! • Check over your work. • Review power points on my website! • Due next class. Please complete at home!

More Related