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Warmup

Warmup. Write a balanced chemical equation for the reaction between sugar and concentrated sulfuric acid, forming pure carbon and hydrated sulfuric acid. If I’m using 90g of sugar and 90mL of 18M sulfuric acid, what is the final molarity of the hydrated (more dilute) sulfuric acid?

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Warmup

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  1. Warmup Write a balanced chemical equation for the reaction between sugar and concentrated sulfuric acid, forming pure carbon and hydrated sulfuric acid. If I’m using 90g of sugar and 90mL of 18M sulfuric acid, what is the final molarity of the hydrated (more dilute) sulfuric acid? What is the final pH? How many grams of sodium bicarbonate would it take to neutralize the acid? (ITSA TRAP!)

  2. FEBRUARY 27, 2012 pH Calculations

  3. Science Fair Bring your science fair work on Wednesday for 45 minutes of work time (on USB, printout). • Organizing data or creating your scatterplots • Peer editing • Converting research paper  posterboard • Preparing interview cards • Finishing the poster-board display

  4. Acid and Base Review Arrhenius Acids and Bases Have either an H+ (acid) or OH- (base) ion that will disassociate when dissolved. Ex: HCl (acid), NaOH (base) Bronstead-Lowry Acids and Bases Steal an OH- (acid) or H+ (base) from an existing water molecule. Ex: NH3  NH4+ (base) Lewis Acids and Bases Acids accept an electron pair while bases donate them. Ex: NH3 (base) and BF3 (acid) pH Scale pH = -log [H+]

  5. Loading the MS Excel Solver 2007/2010 – Start orb  “Excel options”  “Add-ins”  “Manage add-ins”  Go  “Solver-add in” 2003 – “Tools”  “Add-ins”  check “Solver add-in” *There’s also cool stuff in the analysis tool-pack, btw

  6. Sample f(x) = x2 + 8x + 16, solve for x You can place a ‘guess’ value in cell D2 to start the solver with. The guess can be helpful for finding a specific root if more than one exists. Solver “targets cell A5” by “changing cell D2”, in order to “equal 0”.

  7. Using the MS Excel Solver Hit F1 and search for the help file on the Solver. Write a quadratic equation, and try using the Solver.

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