2009HE2key - Name (1 point):_ CHEM 1211: Principles of...

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Name (1 point):__________________________________________ CHEM 1211: Principles of Chemistry I Hour Exam II October 16, 2009 1. For each of the following metathesis reactions, i. Give the products (including phases like aq, s, l, g ), and provide a balanced molecular equation, (2 points each) ii. Write the ionic equation, and indicate the spectator ions (2 points ea.) iii. Write the net ionic equation (1 point ea.). If there is no net reaction, write "N/A". a) 2 Na 3 PO 4 ( aq ) + 3 Ba(NO 3 ) 2 ( aq ) 6 NaNO 3 (aq) + Ba 3 (PO 4 ) 2 (s) Ionic Equation: 6Na + + 2PO 4 3- + 3Ba 2+ + 6NO 3 ¯ 6Na + + 6NO 3 ¯ + Ba 3 (PO 4 ) 2 (s) Net Ionic Eq'n: 2 PO 4 3- + 3 Ba 2+ Ba 3 (PO 4 ) 3 (s) b) KOH( aq ) + HNO 2 ( aq ) KNO 2 (aq) + H 2 O(l) Ionic Equation: K + + OH¯ + HNO 2 (aq) K + + NO 2 ¯ + H 2 O(l) Net Ionic Eq'n: OH¯ + HNO 2 (aq) NO 2 ¯ + H 2 O(l) c) 2 NH 4 Cl( aq ) + Ba(OH) 2 ( aq ) 2 NH 3 (g) + 2 H 2 O(l) + BaCl 2 (aq) Ionic Equation: 2 NH 4 + + 2 Cl¯ + Ba 2+ + 2 OH¯ 2 NH 3 (g) + 2 H 2 O(l) + Ba 2+ + 2 Cl¯ Net Ionic Eq'n: 2NH 4 + + 2OH¯ 2NH 3 (g) + 2H 2 O(l) 2. A concentrated sulfuric acid solution is 94.0% H 2 SO 4 by mass and has a density of 1.831 g/mL. a) What is the concentration of H 2 SO 4 in grams per liter (g/L)? (3 points) 94.0 g H SO 100 g solԢn 1.831 g solԢn 1 mL solԢn 1000 mL solԢn 1 L solԢn ൌ 1721 g/L 1720 g/L b) What is the concentration of H 2 SO 4 (MM = 100.46 g/mol) in molarity (mol/L)? (3 points) 1721 g H SO 1 L SolԢn 1 mol H SO 100.46 g H SO ૚ૠ. ૚ ۻ (note: the molar mass given in this problem is wrong for H
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