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Monday January 9, 2012

Monday January 9, 2012. ( Mole – Mole Stoichiometry; WS – Chart It! Think-Pair-Share Part 1). Bell Ringer Monday, 1-9-12. Hydrochloric acid reacts with magnesium hydroxide. Predict the products and balance the equation. 2. HCl + æ. Mg(OH). MgCl 2 + HOH. 2.

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Monday January 9, 2012

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  1. MondayJanuary 9, 2012 • (Mole – Mole Stoichiometry; WS – Chart It! Think-Pair-Share Part 1)

  2. Bell RingerMonday, 1-9-12 Hydrochloric acid reacts with magnesium hydroxide. Predict the products and balance the equation. 2 HCl + æ Mg(OH) MgCl2 + HOH 2 15 moles of magnesium hydroxide will produce how many moles of water? 15 mol Mg(OH)2 2 mol H2O 30 mol H2O = X 1 1 mol Mg(OH)2

  3. Announcements • I will not be available this afternoon after school.

  4. Complete Worksheet(4F3) Stoichiometry: Mole to Mole Conversions

  5. Mole Ratios Sample Problem Example: hydrogen gas reacts with oxygen gas to produce water. First, write and balance the equation. H2 + O2→ H2O This means that 2 moles of hydrogen gas react with 1 mole of oxygen gas to produce 2 moles of water. The mole ratio of H2 to O2 is 2:1 The mole ratio of H2 to H2Ois 2:2 The mole ratio of O2to H2Ois 1:2 2 2

  6. Mole - Mole Stoichiometry Mole - mole stoichiometry enables you calculate the number of moles of a substance that is a reactant or a product in a reaction if you know the number of moles of another substance in the same reaction.

  7. Mole - Mole Stoichiometry Sample Problem Magnesium metal reacts with oxygen gas to produce magnesium oxide. If 5 moles of magnesium metal react, how many moles of magnesium oxide will be produced? First, write the balanced chemical equation. Mg + O2æMgO Using the formula for mole – mole conversions, the calculation would look like this: 2 2 2 mol MgO 5 mol Mg 2 X = 5 mol MgO 1 mol Mg 2

  8. Mole - Mole Stoichiometry Sample Problem In the space shuttle, the carbon dioxide exhaled by astronauts has to be removed to prevent the crew from suffocating. Carbon dioxide can be removed by its reaction with lithium hydroxide to produce lithium carbonate and water, which are not harmful to the astronauts. Write the balanced chemical equation for the reaction, then determine how many moles of lithium hydroxide are required to react with 20 mol of carbon dioxide, the average amount exhaled by each crew member each day? CO2 + LiOHæLi2CO3 + H2O 2 20 mol ? mol

  9. Mole - Mole Stoichiometry Sample Problem CO2 + LiOHæLi2CO3 + H2O 2 20 mol ? mol mol LiOH 20 mol CO2 2 = mol LiOH 40 X 1 1 mol CO2

  10. Mole - Mole Stoichiometry Sample Problem CO2 + LiOHæLi2CO3 + H2O 2 20 mol ? mol mol LiOH 20 mol CO2 2 = mol LiOH 40 X 1 1 mol CO2

  11. Begin Worksheet(4F4) Chart It! Think – Pair – Share (Part 1)

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