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What were the two reactants in the Ira Remsen demonstration?

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What were the two reactants in the Ira Remsen demonstration?

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  1. CHEMISTRY 8-28-07 Tue(per 1,2,3)WARM-UP: What were the two reactants in the Ira Remsen demonstration? Is this a chemical or physical change? Explain.TODAY’S GOALS:1) Turn in essay & signed contracts.2) Take Sec 1.1-1.2 quiz & safety quiz. 3) Notebook introduction. 4) Ira Remsen Demonstration notes.HW: Sec. 1.3—Read & take notes.

  2. What were the two reactants in the Ira Remsen demonstration? Copper (Cu) & nitric acid (HNO3)

  3. Equation for the reaction: Cu(s) + HNO3(aq)  NO2(g) + H2O(l) + Cu(NO3)2(aq) reactants  products Copper + nitric acid produces nitrogen + water + copper(II)nitrate dioxide things on the left  things on the right

  4. State symbols • “s” = solid • “l” = liquid • “g” = gas • “aq” = aqueous (dissolved in water)

  5. Energy changes • Because heat is released in this reaction it is called an “exothermic” reaction.

  6. Why does the penny have to be “old”? • Pre-1982 pennies are mostly copper. • Post-1982 pennies are made up of a zinc core surrounded by a thin layer of copper.

  7. Chemistry of Color • The NO2 gas produced is brown—ALL COLORED GASES ARE POISONOUS. • Copper ions tend to produce blue solutions.

  8. CHEMISTRY 8-28-07 Tue (per 6)WARM-UP: Consider the formula C12H22O11. How many and what type of atoms are there? TODAY’S GOALS:1) Turn in signed safety contracts.2) Take Sec 1.3 quiz. 3) Lab notebook introduction.4) Blue Bottle Lab instructions. HW: Scientific Method WS, pg 1 only.

  9. What is this: C12H22O11?How many and what type of atoms are there? • C12H22O11 is a formula, not an equation!! • carbon = 12 atoms • hydrogen = 22 atoms • oxygen = 11 atoms • for a total of 45 atoms

  10. CHEMISTRY 8-28-07 Tue (per 7)WARM-UP: Detail the Ira Remsen demonstration and TURN IN!! TODAY’S GOALS:1) Turn in signed safety contracts.2) Take Sec 1.3 quiz. 3) Lab notebook introduction.4) Blue Bottle Lab instructions. HW: Scientific Method WS, pg 1 only.

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