1 / 27

Stoichiometry

Stoichiometry. pd 5 3/25/10. #20 What mass of K 2 O is produced when 6.92 g of K reacts with 4.28 g of O 2 ?. First Step. Make an equation. Start Making Ratios. Balance equation. Incorrect. *Remember you can’t start the ratio without an equation. Back to the question.

channary-khin
Download Presentation

Stoichiometry

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. Stoichiometry pd 5 3/25/10

  2. #20What mass of K2O is produced when 6.92 g of K reacts with 4.28 g of O2?

  3. First Step Make an equation Start Making Ratios Balance equation

  4. Incorrect *Remember you can’t start the ratio without an equation Back to the question

  5. Step #2Which is the correct equation? K + O2 K2O 4K + O2 2K2O 4K + O 2K2O

  6. Correct To the next step

  7. Correct To the next step

  8. Correct To the next step

  9. Correct To the next step

  10. Correct To the next step

  11. Correct To the next step

  12. Correct To the next step

  13. Correct YOU FINISHED THE EQUATION

  14. Incorrect • Remember Balance • the equation Back the question

  15. Step #3Which one is the correct ratio setup? • Here is the original question and the balanced • Equation. • What mass of K2O is produced when 6.92 g of K reacts with 4.28 g of O2? • 4K + O2 2K2O

  16. Incorrect Make sure you cancel out your elements. Make sure you have the right numbers in the right places. Back to the question

  17. Step #4What is the answer? 2.4 g K2O 8.34 g O2 8.34 g K2O

  18. Incorrect • Make sure you multiply not add Back to the question

  19. Step #5What about the other element? What is the setup for the next ratio? • Here is the original • Problem and the balanced equation. • What mass of K2O is produced when 6.92 g of K reacts with 4.28 g of O2? • 4K + O2 2K2O

  20. Incorrect • Make sure your compounds are opposite of each other Back to the question

  21. Step #6What is the answer? 25.2 g O2 25.2 g K2O 4.28 g K2O

  22. Incorrect • Make sure you have the correct unit/compound and make sure you multiplied right Back to the question

  23. Step #7Limiting Reactants How do you tell which one is the limiting reactant? Which ever one is more than the other Which ever one is the lesser one I do not know

  24. Incorrect • Limiting is the key word, it usually means less Back to the question

  25. Step #8Which one is limiting? 8.34 g K20 25.2 g K2O None

  26. Incorrect • Limiting = less Back to the Question

  27. The End

More Related