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N H 2 O Na K

Warm up 9/23 & Lab Turn in* Identify the following symbols & identify whether they are Elements (E) or Compounds (C). N H 2 O Na K. H 2 SO 4 HCl Cl NaCl. Write the equation: H 2 O+ H +  H 3 O + What are the products and what are the reactants?

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N H 2 O Na K

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  1. Warm up 9/23 & Lab Turn in*Identify the following symbols & identify whether they are Elements (E) or Compounds (C). • N • H2O • Na • K • H2SO4 • HCl • Cl • NaCl Write the equation: H2O+ H+ H3O + What are the products and what are the reactants? *Staple pages 3-6 + 2 sheets of graph paper and put in basket in the front of the classroom. 1:47 1:48 1:49 1:50 1:51 1:52 1:54 1:46 1:55 1:56 1:57 1:29 1:53 1:45 1:43 1:30 1:44 1:31 1:32 1:33 1:35 1:36 1:34 1:38 1:39 1:40 1:42 1:37 1:58 1:01 1:41 1:27 1:28 1:26 1:25 1:24 1:23 1:22 1:21 1:20 1:19 1:18 1:17 1:16 1:15 1:14 1:59 1:12 1:13 2:00 1:00 1:02 1:04 1:05 1:03 1:07 1:08 1:09 1:10 1:11 1:06 0:51 0:48 0:49 0:50 0:52 0:58 0:54 0:55 0:56 0:57 End 0:53 0:47 0:40 0:45 0:43 0:42 0:41 0:39 0:38 0:37 0:36 0:35 0:34 0:33 0:31 0:32 0:46 0:44 0:13 0:14 0:30 0:19 0:16 0:17 0:18 0:20 0:26 0:22 0:23 0:24 0:25 0:27 0:21 0:15 0:09 0:12 0:11 0:10 0:08 0:07 0:06 0:05 0:04 0:03 0:02 0:28 0:01 0:29 0:59

  2. Chemistry cont.Chemical Reactions (rxn) EX. NaOH + HClNaCl + H2O • reactants: left side • products: right side • Exergonic/exothermic: release energy like heat, explosion, light etc. – feels warm • endergonic/endothermic: requires energy to occur and takes it from the environment- feel cold

  3. Activation Energyenergy needed to start a rxn

  4. NEED TO MEMORIZE THE FOLLOWING ELEMENTS AND COMPOUNDS FOR YOUR QUIZ AND TEST! COMPOUNDS H2O: water NaCl: sodium chloride/salt H2SO4: sulfuric acid HCl: hydrochloric acid NaOH: sodium hydroxide CO2: carbon dioxide O2: oxygen gas ELEMENTS • H: hydrogen • O: oxygen • N: nitrogen • C: carbon • Na: sodium • Cl: chlorine • K: potassium • S: sulfur

  5. ACIDS, BASES, AND pH pp. 39-44

  6. WaterPolar (covalent) compound • acts like a magnet with + attracted to – • pulls apart molecules like NaCl (ionic bond) Water has a positive (+) and negative (-) “pole” (+) is due to H and (-) is O

  7. WaterBonding covalent bonds hold H2O together hydrogen bonds hold molecules of H2O Covalent > Hydrogen

  8. Acids and Bases H2O = water H+ = hydrogen ion OH- = hydroxide ion

  9. Acids and Bases • H2O  H+ + OH- • H+ reacts with H2O H2O + H+ H3O+ (hydronium) • H3O+ more commonly written as H+

  10. Warm up 9-25 Define the following terms Describe 2 properties of water’s bonding. Name 3 properties of an acid? • H2SO4 • CO2 • K • S • H3O+

  11. Acids Acids: H+ > OH- pH less than 7 Acid Properties: tastes sour, highly corrosive EX. HCl, H2SO4

  12. Bases Bases: OH- > H+ pH more than 7 Base Properties: tastes bitter, feel slimy, caustic EX. NaOH, Mg(OH)2

  13. pHpower of Hydronium • measures acidity (from 0-14) and how much H3O+/H+ is present. The closer to 0, the more the H3O +/H+ 0 up to 7 = acid 7 = neutral over 7 = base/alkaline • Can use indicators to tell the pH ( phenol red, pH paper, litmus, BTB)

  14. InterventionThursday:10/3 @ 2:40 pmFriday: 10/4 @ 6:50 am • This year biology is offering intervention to insure success for all students. • Before each exam students will have the opportunity to attend a targeted study review session. • To be credited with intervention students must attend one 45 min intervention session and complete all corresponding work. • Students will have two opportunities to complete intervention. • Intervention will be offered once before school and once after school the week of the exams. Specific Dates will be posted on teacher website. • Completion of intervention will earn students a 5% test score increase to a maximum of 75% on the test. • At any time during the semester if student’s class average falls below 70% he or she is expected to attend intervention until grade improves.

  15. RAFT Project • Role, Audience, Format, Topic • Due Friday Oct. 4th at the beginning of class. • Worth a lot of points

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