Rates of Reaction Problem

Consider a solution of 0.10 M H##^{+}## in 0.10 M thioacetimide at 25 ##^\circ##C
rate = k[H##^{+}##][CH##_3##CSNH##_2##]
How are the rate and the rate constant (k) effected when water is added to the solution? When the reaction is heated to 75##^\circ##C ? When NaOH is added?