Answer to Question #75863 in General Chemistry for adam

Question

In a synthesis experiment 2.3mL of 25% (v/v) en in ethanol was used to make a complex Nickel salt. Calculate the mols of en used in this synthesis. You may assume a density of ethanol of 0.789g/mL and a density for en of 0.899g/mL. Report your answer in units of mol.

Answer 1

Solution of ammonia has a density of 0.899 g/ml.

en – NH3

V(NH3) = 2.3ml*0.25 = 0.575 ml

m(NH3) = 0.575ml*0.899g/ml = 0.517 g

n(NH3) = 0.517 g / 17 g/mol = 0.03 mol