Collision theory helps in determining the rate of a reaction as it states that for a reaction to occur it is necessary that there will be number of collisions between reactant molecules.
Therefore, when powdered sugar is placed into water then due to more surface area there will be more number of collisions between sugar and water molecules. As a result, sugar will readily dissolve in water.
On the other hand, surface area of cube will be less as compared to powdered sugar. Hence, there will be less number of collision and cube will take time to dissolve in water.
Le Chatelier's principle states that changing a factor such as concentration, temperature, or pressure of a reaction at equilibrium will cause the reaction to shift in the direction that counteracts the effect of that change.
<em><u>Therefore, when reactants are added to a reaction at equilibrium shift when more reactants are added then the reaction shifts to the right to make more products.</u></em>
