Imagine you are making a lemonade. To make lemonade, you need water, sugar, and lemon juice. After pouring sugar and lemon juice in water and stirring for a while, you get a yellowish liquid called lemonade. Now let's pretend that you want to put a little bit of salt in your lemonade to make it taste extra special. When you add salt to the lemonade, it gets dissolved in water, and you can't see it anymore. The lemonade now tastes a bit salty, and you have made what is called an aqueous solution.
Aqueous solution is just a fancy way of saying that you have mixed something in water until it dissolves completely, and you can't see it anymore. It's like magic! When things dissolve in water, they become part of the water molecules, and the entire mixture is called a solution. Water can dissolve many things like salt, sugar, acids, and bases, making it a universal solvent.
In summary, an aqueous solution is a mixture of water and something that has dissolved in it. For example, lemonade is an aqueous solution of water, sugar, lemon juice, and maybe a pinch of salt.