If the magnitude of a charge is tripled, does the magnitude of the force triple as well? If there are two charges are tripled, how is the magnitude of force found then? By multiplying?

Answer 1

Goodness. When in doubt, look at the governing equations.
force= k q1*q2 /distance^2
so if q1 is x3, F is x3
and if q1*q2 = 3x3= 9, ....