# 1. Calculate the molar mass of CoCl2 6H2O. 2 . What mass (in g) is needed to make 100ml of a 0.080M CoCl2 6H2O solution? 3 . After the 0.080M CoCl2 6H2O solution was made, it’s absorbance at 510 n

1. Calculate the molar mass of CoCl2 6H2O.

2 . What mass (in g) is needed to make 100ml of a 0.080M CoCl2 6H2O solution?

3 . After the 0.080M CoCl2 6H2O solution was made, it’s absorbance at 510 nm was measured. It was found to be .370. what is the molarity of the solution based on the absorbance?

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4 . What kind of Molarity is the value calculated above?

5 . What is the percent error for the solution made in part A?

6 . What volume (in mL) of the 0.080M CoCl2 6H2O solution in part A is needed to make 100.00mL of a 0.060M CoCl2 6H2O solution?

7 . After the 0.060M CoCl2 6H2O solution was made, it’s absorbance at 510nm was measured to be 0.270. What is the Molarity of the solution based on the absorbance?

8 . What is the percent error for the solution made in part B? 