[s3a]

A question is asking me to prove that a chemical system that a system with gaseous and solid reactants will react slower than an a system with aqueous reactants by using the collision theory.

Is it proper to say that gases and solids collide less than aqueous solutions or must I absolutely say it the following way?: "The more complex the nature of the reactants, the more bonds that have to be broken. This increases the number of effective collisions needed. This makes the reaction slower"

Any help would be greatly appreciated!
Thanks in advance!

[Schrödinger]

It think it is OK to say that.

More the freedom of movement of the molecules, more will be the number of effective collisions, as the molecules are free to move about in the container.

When u consider a gas and a solid, although the gas molecules are free to move about, the solid is actually confined to a restricted space in the reaction container.

But when u consider a reaction mixture with aqueous reactants, then the components are much more mobile in the liquid phase than the previous case with solids and gases.

So, i think u are right in saying that the number of collisions in much more in the aqueous medium.