Chem 142 Quiz 4 Spring 2007 Name __________________________ Instructor: Martin LarterLast First1. SHOW ALL WORK. In a typical Gen Chem lab experiment, 50.00 mL of 0.100 M NH4Cl istitrated with 0.125 M NaOH. Calculate the pH of the solution at each of the following points. Ineach case, write a balanced net ionic equation for the major equilibrium reaction on which yourcalculation is based. [The pKb of NH3 is 4.76.] (a) (7 points) before any NaOH is added (b) (7 points) after addition of 20.00 mL of NaOH (c) (7 points) at the equivalence point2. Predict if the following salt solutions will produce an acidic, basic, or neutral solution. If acidic or basic, write a "correct" equation that supports your prediction. (7 pts)Salt Acidic, basic,neutral?EquationC6H5NHBrK2SSr(ClO4)23. What is the main objective of today’s lab (The new one, not the one that you are finishing) (4
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