Indicate what error (small, large, or none) is introdu
what error (small, large, or none) is introduced into the percent iron in the unknown
and explain briefly why in each case.
a. if the permanganate solution contains some contaminant.
b. if h2so4 is not added to the solution.
c. if some iron unknown is spilled after weighing, but before titrating with kmno.

Idk lolb. jinbbffv nennejejej

500bc indiais the answer.

What are the choices?

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.