Final answer:
The rate of reaction increases when a solid is broken into smaller pieces due to the larger surface area exposed to the liquid, and when the temperature of the liquid is raised, as this provides more kinetic energy, increasing collision frequency and reducing viscosity.
Step-by-step explanation:
The rate of reaction between a solid and a liquid can be altered in a couple of ways, including changing the size of the solid pieces and adjusting the temperature of the liquid. When you break down a solid into smaller pieces, you increase the surface area available for reaction. This means that there are more solid particles on the outside that can collide with the liquid particles, leading to more frequent collisions and a faster reaction rate. Larger surface area correlates with more collisions and an accelerated rate of reaction.
Changing the temperature also impacts the rate of reaction. When you increase the temperature of the liquid, you are essentially providing more kinetic energy to the particles. This results in an increased collision frequency, which means that particles collide more often and with greater energy, further speeding up the reaction. It's worth noting that higher temperatures often lead to a decreased viscosity in liquids, allowing for freer movement of the particles and thus, higher collision rates.