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Molarity and Stoichiometry

Molarity and Stoichiometry. 1. Calculate the number of grams of sodium carbonate that are required to react fully with 125.0 mL of 0.958 M HCl. Na 2 CO 3( aq ) + 2HCl ( aq ) → 2NaCl ( aq ) + H 2 O (l) + CO 2(g). ? g. 0.125L. 0.125L HCl.

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Molarity and Stoichiometry

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  1. Molarityand Stoichiometry

  2. 1. Calculate the number of grams of sodium carbonate that are required to react fully with 125.0 mL of 0.958 M HCl. Na2CO3(aq) + 2HCl (aq) → 2NaCl (aq) + H2O (l) + CO2(g) ? g 0.125L 0.125L HCl x 0.958 mol x 1 mol Na2CO3 x 106.0 g = 6.35 g Na2CO3 1L 2 mol HCl 1 mol

  3. 2. How many milliliters of 0.698 M hydrochloric acid are needed to produce 3.4 L of sulphur dioxide gas at STP? Na2SO3(aq) + 2HCl (aq) → 2NaCl (aq) + H2O (l) + SO2(g) ? mL 3.4 L 3.4 L SO2 x 1 mol x 2 molHCl x 1 L x 1000 mL 22.4 L 1 mol SO2 0.698 mol 1L = 4.3 x 102 mL

  4. 3. What volume of 0.300 M KOH will neutralize 100.0 mL of 0.200 M H2SO4 1 H2SO4 + 2 KOH → 2HOH + 1 K2SO4 0.1000 L ? L 0.1000 L H2SO4 x 0.200 mol x 2 mol KOH x 1L 1L 1 mol H2SO4 0.300 mol = 0.133 L of KOH

  5. 4. 13.8 L of CO2 @ STP is dissolved in 250.0 mL of water. What is the molarity of the resulting solution? 13.8 L CO2 x 1 mol 22.4 L Molarity = 0.250 L = 2.46 M Video Footage of a Ghost in the Chem Lab

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