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J – TPS

J – TPS. Why did Edward Norton’s skin start to burn off when Brad Pitt put the powder on his skin? What was happening at the chemical level?. Today’s Learning Targets. 6.2 – I can describe what an acid and base are using the idea of hydrogen ion donation and hydrogen ion accepting.

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J – TPS

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  1. J – TPS • Why did Edward Norton’s skin start to burn off when Brad Pitt put the powder on his skin? • What was happening at the chemical level?

  2. Today’s Learning Targets • 6.2 – I can describe what an acid and base are using the idea of hydrogen ion donation and hydrogen ion accepting. • 6.3 – I can characterize a compound as either a strong acid/base or weak acid/base based on how much it dissociates.

  3. Arrhenius Acids/Bases • An Arrhenius acid gives a H+ to a solution in an acid/base reaction • An Arrhenius acid will have a Hin its chemical compound (e.g. HCl, HNO3, H2SO4, etc.) • An Arrhenius base gives an OH-to a solution in an acid/base reaction • An Arrhenius base will have an OH in its chemical compound (e.g. NaOH, KOH, Ca(OH)2, etc.).

  4. Bronsted-Lowry Acids/Bases • Refined Arrhenius’ theory of acids/bases • Bronsted-Lowry Acid – Donate (give) a H+ to solution • Bronsted-Lowry Acid – Accept (take) a H+ from solution. • All Arrhenius acids/bases are Bronsted-Lowry acids/bases, but not all Bronsted-Lowry acids/bases are Arrhenius acids/bases.

  5. Class Example • Label the acid, base, and salt in the following reaction. Identify the acids and bases as either Arrhenius, Bronsted-Lowery, or both. HClO3 + KOH  H2O + KClO3

  6. My Turn • Label the acid, base, and salt in the following reaction. Identify the acids and bases as either Arrhenius, Bronsted-Lowery, or both. H2SO4 + RbOH H2O + RbHSO4

  7. Strength of Acids/Bases • Acids/Bases can be classified as strong or weak based on how much it disassociates. • Disassociate – To break apart • Acids/Bases that completely dissociate are called strong acids/bases • Acids/Bases that only partially dissociate are called weak acids/bases • A solution of weak acid/base has some in the acid/base form and some in the broken apart form.

  8. Strong Acids • HI • HBr • HCl • HClO4 • HClO3 • H2SO4 You must memorize these!

  9. Strong Bases • Ca(OH)2 • Sr(OH)2 • Ba(OH)2 • NaOH • KOH • RbOH • CsOH You must memorize these!

  10. All acids/bases that are not on this list are weak acids/bases

  11. Summarize

  12. Acid/Base Simulator • With a partner of your choice, take out a computer and the handout you picked up on the way in. • Complete the acid/base dissociation activity

  13. Work Time Complete the worksheet you picked up when you came in.

  14. Learning Log Assessment Rate yourself 1 – 4 on LTs 6.1, 6.2, and 6.3

  15. Exit Slip 1. What are two properties of an acid? 2. What is an Arrhenius acid? 3. What makes something a strong or weak base?

  16. Learning Log Assessment Using your exit slip score, re-rate yourself on LTs 6.1, 6.2, and 6.3

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