When aqueous NH3, is first added to a solution containing Ni2 , a precipitate forms, but when an excess of aqueous NH3 is added, the precipitate dissolves. Which of the following best explains why the precipitate dissolves? a. Ni2+ forms hydrogen bonds with NH3
b. Ni2+ forms a complex ion with NH3
c. Ni2+ acts as a Bronsted-Lowry base.
d. Ni2+ is oxidized to Ni3+
e. Ni2+ is reduced to Ni+

Hey how did you manage to type such a big lab report

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.