Okay kiddo, so you know how when you add sugar to your lemonade, it disappears and makes the lemonade sweeter? That's called a solution. And when we talk about the rate of solution, we're talking about how fast the sugar disappears in the lemonade.
So imagine you have two cups of lemonade, one with just a little bit of sugar and one with a lot of sugar. The cup with a lot of sugar will make the lemonade taste sweeter faster than the cup with just a little bit of sugar. That means the rate of solution in the cup with a lot of sugar is faster.
But there are other things that can affect the rate of solution too. Like if you stir the lemonade, it will make the sugar dissolve faster because the water molecules are moving around and hitting the sugar particles. And if you add hot water to the sugar instead of cold water, it will also dissolve faster because the hot water molecules are moving around even more quickly.
So basically, the rate of solution is all about how fast something dissolves in something else, and it can be affected by things like how much of the substance you have, how much you stir it, and what temperature the mixture is.