Chemistry 10 Dr Scholefield Chapter 13 Worksheet Homework is not collected or graded but should be worked on seriously every week Solution Molarity Dilutions and Stoichiometry 1 13 9 g of solid KNO3 are dissolved in enough water to make 175 mL of an aqueous potassium nitrate solution What is the molarity of this solution 2 How many moles of HCl are dissolved in 25 0 mL of a 4 36 M hydrochloric acid solution How many grams of HCl are dissolved in this solution 3 What volume in mL of a 0 650 M aqueous glucose solution C6H12O6 contains 5 48 grams of glucose 4 A solution is prepared by mixing 36 0 g of CaCl2 with 271 g water The density of this solution is 1 09 g mL a What is the molarity of this solution b Suppose 55 0 mL of water are now added to this solution What is its new molarity 5 What volume of 18 0 M H2SO4 aq and water would you need to prepare 5 00 L of 2 65 M H2SO4 aq 6 Oxygen gas can be generated by the catalytic decomposition of an aqueous solution of hydrogen peroxide 2 H2O2 aq 2 H2O l O2 g If the complete decomposition of 48 2 mL of H2O2 aq yields 2 33 grams of oxygen what is the molarity of this solution 7 Consider the reaction 3 CuSO4 aq 2 Na3PO4 aq Cu3 PO4 2 s 3 Na2SO4 aq a What volume in milliliters of a 2 93 M aqueous solution of sodium phosphate will completely react with 41 8 mL of a 1 65 M aqueous solution of copper II sulfate b What mass of solid copper II phosphate precipitate in grams will be produced by this reaction 8 During a certain titration 32 9 mL of 0 124 M aqueous barium hydroxide was required to completely neutralize 25 0 mL of nitric acid Determine the molarity of the nitric acid 9 Consider the reaction Al2 CO3 3 s 6 HCl aq 3 CO2 g 3 H2O l 2 AlCl3 aq What volume in L of carbon dioxide gas will be collected at STP if 4 00 grams of aluminum carbonate are mixed with 34 7 mL of 6 00 M hydrochloric acid 10 Which of the two molecules shown below do you expect to be more soluble in water Why H F O O 11 Consider the following scenarios and determine if the substances in question are ionic polar covalent or nonpolar covalent Substance A is insoluble in water but dissolves readily in the solvent CS2 Substance B dissolves readily in water The resulting solution conducts electricity Substance C dissolves readily in water The resulting solution does not conduct electricity 12 Consider the ionic compound magnesium fluoride MgF2 a Sketch a diagram showing the interactions between the ions and water when this compound is dissolved b Do you expect MgF2 to be more or less soluble than MgCO3 in water Why c Do you expect MgF2 to be more or less soluble than NaF in water Why
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