in an experiment, a student wants to increase the rate of a reaction that involves gases. which change to…

in an experiment, a student wants to increase the rate of a reaction that involves gases. which change to the reactants would accomplish this?\n\nincrease the volume to decrease pressure and to increase concentration.\n\nincrease the volume to increase pressure and to decrease concentration.\n\ndecrease the volume to decrease pressure and to increase concentration.\n\ndecrease the volume to increase pressure and to increase concentration.

in an experiment, a student wants to increase the rate of a reaction that involves gases. which change to the reactants would accomplish this?\n\nincrease the volume to decrease pressure and to increase concentration.\n\nincrease the volume to increase pressure and to decrease concentration.\n\ndecrease the volume to decrease pressure and to increase concentration.\n\ndecrease the volume to increase pressure and to increase concentration.

Answer

Brief Explanations:

According to the ideal - gas law and reaction - rate principles, for gas - phase reactions, decreasing the volume increases the pressure (Boyle's law: $P_1V_1 = P_2V_2$ at constant temperature and amount of gas). Also, decreasing the volume increases the concentration of the gas reactants (concentration = amount of substance/volume). Higher concentration and higher pressure generally increase the rate of a gas - phase reaction as there are more frequent collisions between reactant molecules.

Answer:

Decrease the volume to increase pressure and to increase concentration.