1 / 19

Bell Work:

Bell Work:. 1.) Get out a blank piece of notebook paper. 2.) Complete the worksheet you have received. 3.) Write Notes 2-6: Chemical Formulas and Balancing Chemical Equations on the top of your blank piece of paper. Homework : 1.) Begin work on Balancing Equations worksheet

deiondre
Download Presentation

Bell Work:

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. Bell Work: • 1.) Get out a blank piece of notebook paper. • 2.) Complete the worksheet you have received. • 3.) Write Notes 2-6: Chemical Formulas and Balancing Chemical Equations on the top of your blank piece of paper. Homework: 1.) Begin work on Balancing Equations worksheet 2.) Study for your final

  2. Notes 2-6 Chemical Formulas & Balancing Chemical Equations

  3. What is a Chemical Reaction? • When two or more substances react chemically to form something new. • A process that leads to the transformation of one set of chemical substances to another. • Chemical equations are used to graphically illustrate chemical reactions.

  4. What is a molecule? • A molecule is defined as a group of at least two atoms in a definite arrangement held together by covalent chemical bonds. • It is the smallest whole piece of a substance. • A molecule may consist of atoms of a single chemical element, as with oxygen (O2), or of different elements, as with water (H2O).

  5. Chemical Formula or Molecular Formula • The molecule methane (chemical formula CH4)

  6. Write This Down!Molecular Formula • H2O • Element symbol • Subscript number (number of atoms in the molecule.)

  7. Write This Down!Structural Formula • They show the arrangement of the atoms within the molecules, which atoms are bonded to which, and whether single, double or triple bonds are present. • Structural formula of Water - H2O

  8. C6H12O6

  9. Chemical Equation Example:

  10. What would be the formula for this reaction?

  11. What is a Chemical Equation? • A chemical equation consists of the chemical formulas of the reactants (the starting substances) and the chemical formula of the products • The two are separated by an arrow symbol → usually read as "yields“. • The formula for the burning of methane CH4 + 2 O2 CO2 + 2 H2O

  12. Burning Methane is what you use to heat something with a gas stove…..we call it natural gas

  13. Write This Down!Parts of a Chemical Equation Coefficient Subscript CH4 + 2O2 CO2 + 2H2O Reactants Yields Products methane + oxygen carbon dioxide + water

  14. Write This Down!The Law of Conservation of Mass • States that mass (atoms) is neither created nor destroyed in any ordinary chemical reaction. • Therefore, the mass of the products in a chemical reaction must always equal the mass of the reactants. CH4 + 2 O2CO2 + 2 H2O • Equations must balance……..

  15. Balanced? H2 + O2 H2O Fix this equation.

  16. Balanced? P2 + O2 P2O5 Fix this equation.

  17. Balanced? NH4NO2 N2 + H2O Fix this equation.

  18. Balancing Equations • A good website for practice. • http://www.sciencegeek.net/Chemistry/taters/EquationBalancing.htm

  19. KHAN Academy • http://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiometry/v/balancing-chemical-equations

More Related