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Dissociation of water

pH. Dissociation of water. What is pH?. Potential hydrogen Scale used to measure the acidity or basicity of a solution. Acids. Molecules that dissociate in water, releasing H +. Bases. Molecules that take up H + or release OH -. Neutralization Reaction. pH scale.

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Dissociation of water

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  1. pH

  2. Dissociation of water

  3. What is pH? • Potential hydrogen • Scale used to measure the acidity or basicity of a solution

  4. Acids • Molecules that dissociate in water, releasing H+

  5. Bases • Molecules that take up H+ or release OH-

  6. Neutralization Reaction

  7. pH scale

  8. As you move down scale each unit has 10x the H+ concentration • pH 0 = 1 mol/L • pH 1 = 0.1 mol/L • pH 2 = 0.01 mol/L • pH 3 = 0.001 mol/L • pH 4 = 0.0001 mol/L • pH 5 = 0.00001 mol/L • pH 6 = 0.000001 mol/L • pH 7 = 0.0000001 mol/L

  9. Why is pH 7 considered neutral?

  10. Litmus test is used to determine if a substance is an acid or base

  11. Buffers • Chemical or combination of chemicals that keeps pH within normal limits • Where may we find a buffering system?

  12. Exit Slip • Explain the difference between the pH of hydrochloric acid and water in terms of hydrogen ion and hydroxide concentration.

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