CHEM 150 HOMEWORK #3 Due: Thursday, 7/3/08 1.Calculate αfor a solution of pH = 5.00 produced from sulfurous acid (H2SO3Ka1= 1.72 x 10-2and Ka2= 6.43 x 10-8). 2.The ion M4+(100.0 mL of 0.0500 M metal ion buffered to pH = 9.000) was titrated with 0.0500 M EDTA. What is the concentration of M4+at the equivalence point? 3.Calculate pCo2+when 12.00 mL of 0.03855M EDTA is added to 25.00 mL of 0.02026 M Co2+at pH = 6.000. 4.Calculate pCu2+ when 45.00mL of 0.00100 M EDTA is added to 50.00 mL of 0.00100 M Cu2+at pH = 11.00 and whose NH3concentration is fixed at 0.100 M. 5.A 50.00mL solution containing a mixture of Ni2+and Zn2+was treated with 25.0
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