CH 201 Self Study Worksheet 2 1. a. How many mL of a 0.2350 M Ni(NO3)2 (aq) solution should be used to make 500.0 mL of a 0.1000 M solution? b. If a 0.1763 M solution of Ni(NO3)2 has an absorbance of 0.0721, calculate the absorbance that a 0.2350 M solution would have at the same wavelength and in the same cuvette, assuming the x and y intercepts are (0,0). (Beer's Law: A = /C) 2. a. What is the hydroxide concentration, [OH ], of a solution prepared by mixing 12.3 mL of 1.05 M Ca(OH)2 (aq), 33.7 mL of 0.87 M NaOH and 40.0 mL of water? b. What is the calcium concentration, [Ca*], in the resulting solution