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SOD PowerPoint. Jessica Perry. Question. Will heat be released during Acid / Base chemical reactions?. Hypothesis. I hypothesize that some chemical reactions will produce heat and some will not . I think that reactions with stronger chemicals will produce heat.

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Presentation Transcript

  1. SOD PowerPoint Jessica Perry

  2. Question • Will heat be released during Acid / Base chemical reactions?

  3. Hypothesis • I hypothesize that some chemical reactions will produce heat and some will not. • I think that reactions with stronger chemicals will produce heat.

  4. Computer Generated Ph Chart

  5. My PH Chart

  6. Materials and Procedure

  7. Materials • Acids (200 ml each) • Lemon juice • Vinegar • Soft drink • Orange juice • Milk • Bases (200 ml each) • Baking soda • Milk of magnesium • Ammonia • Bleach • Drain cleaner

  8. Materials (cont.) • Beakers • Digital thermometer • Data sheet • Distilled water • Graduated cylinder • Litmus paper

  9. Procedure • Procedure  • Put 100ml distilled water and thermometer in a beaker • Stir to a constant temp. • Record temp. • Put 50ml acid and 50ml base in separate containers • Make each chemical constant temperature • Record temp. • Add acid and base to beaker with distilled water at same time • Record temp. every 2 seconds for 20 sec. • Clean beakers • Repeat with all acid / base combinations

  10. Data and Graphs

  11. Milk with each base

  12. Lemon Juice with each base

  13. Orange Juice with each base

  14. Vinegar with each base

  15. Soda with each base

  16. Data charts • The data charts show the acid on top and the bases listed down the side • The temperatures are listed in 2 second intervals horizontally across the chart • The reaction with the base on top and the acids on the side

  17. Milk data chart

  18. Orange juice data chart

  19. Lemon juice data chart

  20. Soda data Chart

  21. Milk data chart

  22. Research

  23. Chemical reactions Chemical reactions and changes take place when molecules or elements interact with other elements to form new chemical compounds. In order of two molecules to react, the pair of electrons must collide. The collision needs to be exact on the angle of the collision and the it needs to have enough energy to break the chemical bond. Energy is released and a new and different bond is formed. The reaction rate is measured by the change in consecration of one of the starting materials over time. If some reaction condition is changed, the reaction rate will be changed.

  24. Acid / Base reactions Acid / base chemical reactions are one of the six types of chemical reactions. When an acid and a base are mixed there is a neutralization reaction. Different properties make different chemicals and other liquids acids and bases. When acids are dissolved in water they can conduct electricity, they have a sour taste (lemons and limes are acids), they turn blue litmus paper red, and they neutralize bases. Bases, when dissolved in water have a bitter taste, a slippery feeling when applied to your skin, and can turn red litmus paper blue. The strength of acids / bases are measured on a pH scale. On the scale seven is a neutral chemical like water or blood. Any number below seven and above zero is an acid and numbers eight to fifteen are bases.

  25. Heat Released The amount of heat released can be measured in the change in the temperature of the surrounding objects. If the container is well insulated, the heat released during the reaction will raise or lower the temperature of the contents of the container. If your reaction took place in a calorimeter that wasn’t completely insulated then some the heat would escape. To determine the amount of heat that escapes compare the temperature of change and the heat capacity of the container to the known heat flow.

  26. Pictures and video

  27. Lemon Juice and Baking Soda This is how full it was before the baking soda

  28. Video

  29. Conclusion Based on my observations, acid / base reactions do produce heat. With different strength chemicals more or less heat is produced. With some chemicals the solutions gets colder. My hypothesis was correct in that there was heat produced in most acid base reactions.

  30. Bibliographies

  31. Nave, Carl. Acid – Base Reactions. Georgia State University, 2009. Web. 22 November 2010. Science Dictionary. Chemistry Terms and Definitions Listed Alphabetically. Science Dictionary,2006. Web. 12 November 2010. Le Moyne College. Calorimetry of Acid – Base Neutralization. Le Moyne College, Unknown. Web. 24 November 2010.

  32. Banks, Richard. Chemical Reactions. Boise State University, January 2001. Web. 28 November 2010. Woolf, Henry (editor in chief). “Calorimeter.” Webster’s New Colligate Dictionary.150th Anniversary Edition. 1981. Woolf, Henry (editor in chief). “Enthalpy of neutralization.” Webster’s New Colligate Dictionary.150th Anniversary Edition. 1981.

  33. Woolf, Henry (editor in chief). “Enthalpy of neutralization.” Webster’s New Colligate Dictionary.150th Anniversary Edition. 1981. Woolf, Henry (editor in chief). “Exothermic.” Webster’s New Colligate Dictionary.150th Anniversary Edition. 1981. Woolf, Henry (editor in chief). “Endothermic.” Webster’s New Colligate Dictionary.150th Anniversary Edition. 1981.

  34. THE END

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