1 / 41

Chemical reactions

Chemical reactions. Time to add the last major player before the big show!!!. Parts of a reaction. Reactants → products. I’m the starting materials. I’m the new thing after the reaction. I’m the arrow showing a reaction is taking place. Time to define….

orsen
Télécharger la présentation

Chemical reactions

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 reactions Time to add the last major player before the big show!!!

  2. Parts of a reaction • Reactants → products I’m the starting materials. I’m the new thing after the reaction. I’m the arrow showing a reaction is taking place.

  3. Time to define… • Chemical reaction: any situation where a chemical change occurs making something new. • Breaking bonds: • Making bonds: • Which one do you think usually takes energy to do? • Which one then releases energy??? • yarp

  4. And how do we make/break bonds? • Collision theory: molecules/atoms must be moving fast enough (enough energy) to collide to make and break bonds. • If particles are not moving fast enough, they just bounce off each other… • yarp

  5. Reaction types… The pain I go through to teach…

  6. 5 reaction types… • Composition J + S → JS • Decomposition JS → J + S • Single replacement MS + K → MK + S • yarp

  7. Double replacement AB + CD → AD + CB • Combustion Carbon source + O2 → CO2 + H2O • yarp

  8. Dissection of chemical reactions The long road to glory!!!!

  9. The list of what we shall do • 1. identify signs of a chemical reaction and their significance • 2. determine reactants • 3. predict products • 4. Balance reactions • 5. write it as… • Words • Formulas • Drawn models

  10. First balancing happy!!!! • Rules to balancing equations • 1. write the formulas of the reactants AND products • MUST follow charge rules for ions!!!! • 2. count the # of each element for the reactants • 3. count the # of each element for the products • Yarp that

  11. 4. add coefficients to the LEFT of the compound to balance elements one at a time • 5. do this for each element • Repeat until everything is balanced!!!!! • Sweet table… yarp

  12. practice • Silver nitrate reacts with Iron (III) chloride to produce silver chloride and iron (III) nitrate

  13. One last practice to see what we are getting into!!!! • Sodium metal reacts with water to make sodium hydroxide and hydrogen gas.

  14. Time to take the long road home YOU WILL BE NEEDING 5 COLORED PENCILS, MARKERS, CRAYONS TO SURVIVE!!!!!

  15. Station 1 heating steel wool • Data and observations… what did you see? What are the signs of a reaction?

  16. Station 1 reaction breakdown

  17. Station 2 lead (II) nitrate & sodium iodide • Data and observations… what did you see? What are the signs of a reaction?

  18. Station 2 reaction breakdown

  19. Station 3 heating copper (II) sulfate pentahydrate • Data and observations… what did you see? What are the signs of a reaction?

  20. Station 3 reaction breakdown

  21. Station 4 sodium chloride and potassium nitrate • Data and observations… what did you see? What are the signs of a reaction?

  22. Station 4 reaction breakdown

  23. Station 6 calcium and hydrochloric acid • Data and observations… what did you see? What are the signs of a reaction?

  24. Station 6 reaction breakdown

  25. Station 7 burning methanol • Data and observations… what did you see? What are the signs of a reaction?

  26. Station 7 reaction breakdown

  27. Station 5 homemade alkaseltzer • Data and observations… what did you see? What are the signs of a reaction?

  28. Station 5 reaction breakdown

  29. More station 5 if need be….

  30. More station 5 more??? Man is this beefy!!!

  31. We be done • Done… done for now… now done… all done

  32. More reaction prediction Some cool extra tools to get the job done!!!! Open the grid separately!!!

  33. Let us try it out!!!! • Lithium hydroxide + magnesium bromide • Sodium chloride + zinc nitrate • Potassium bromide + copper (II) hydroxide

  34. Activity series… The sweet metal lab opens us to the last section… nice Open grid AND activity series separate

  35. Lab… • Rank the metals • Go over the lab.

  36. Decreasing activity

  37. Try em… • Add aluminum to copper (II) chloride solution • Add iron to sodium hydroxide solution

  38. Add iron to silver nitrate solution • Calcium acetate solution reacts with potassium carbonate

  39. Ooohhh… make me something • I want to make strontium phosphate. What two reactants should I choose for a double replacement reaction???

  40. How do we get to Carnegie hall? • Practice… • Practice… • Practice!!! • We be done…

More Related