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.

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Presentation transcript:

Molarity and Stoichiometry

1.Calculate the number of grams of sodium carbonate that are required to react fully with mL of M HCl. Na 2 CO 3(aq) + 2HCl (aq) → 2NaCl (aq) + H 2 O (l) + CO 2(g) 0.125L? g 0.125L HClx mol 1L x 1 mol Na 2 CO 3 2 mol HCl x g 1 mol = 6.35 g Na 2 CO 3

2.How many milliliters of M hydrochloric acid are needed to produce 3.4 L of sulphur dioxide gas at STP? Na 2 SO 3 (aq) + 2HCl (aq) → 2NaCl (aq) + H 2 O (l) + SO 2(g) ? mL3.4 L 3.4 L SO L x 1 mol 1 mol SO 2 x 2 mol HCl mol x 1 Lx 1000 mL 1L = 4.3 x 10 2 mL

3.What volume of M KOH will neutralize mL of M H 2 SO 4 1 H 2 SO KOH → 2 HOH + 1 K 2 SO 4 ? L L mol x 1L x 2 mol KOH 1 mol H 2 SO 4 x mol 1L L H 2 SO 4 = L of KOH

L of CO STP is dissolved in mL of water. What is the molarity of the resulting solution? Molarity = L x 1 mol13.8 L CO L = 2.46 M Video Footage of a Ghost in the Chem Lab