1 / 6

Chemical Equilibrium

Chemical Equilibrium.

brigid
Download Presentation

Chemical Equilibrium

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. Chemical Equilibrium Most chemical reactions never completely stop reacting. There reaches a point in a chemical reaction where there is no visible change in the amount of products being formed. Although we see the reaction as being “over”, on the microscopic level there is a constant process occurring.

  2. This process involves products reacting together to reform the reactants again at the same rate as new additional products are being formed from the reactants. In a closed system, this process is known as dynamic chemical equilibrium (concentrations of products and reactants do not change).

  3. Chemical equilibrium can be shown for chemical reactions by using the notation of a double sided arrow (reversible reaction). Since chemical reactions react according to mole ratios of the chemicals, equilibrium calculations are also based on stoichiometry. ICE charts are used to help simplify the calculations for chemical equilibrium systems. See board examples.

  4. Equilibrium Law & Keq Equilibrium is really just a ratio of products to reactants based on the balanced chemical equation. For the general reaction: wW + xX <--> yY + zZ Keq = [Y]y[Z]z [W]w[X]x Where [ ] represents concentrations of all gas (g) or solutions (aq) of chemicals in the reaction • Keq is a constant value for each unique chemical reaction under specified conditions of temperature and pressure. It does not have any units since it is a ratio

  5. Large values of Keq indicate lots of product formation (reaction is near or at completion) • Small values of Keq indicate lots of reactants present • Keq values close to 1 indicate similar ratios of products and reactants

More Related