Okay kiddo, so let me explain what an ideal mixture means. Imagine you have a bucket filled with water and you want to put some sugar in it to make a sweet drink. Now if you keep adding sugar, you will reach a point where the sugar stops dissolving in the water and just sits at the bottom of the bucket, right? That's because there is only so much sugar that can dissolve in water, and beyond that point, it becomes too concentrated.
Now, let's say you continue to add even more sugar to the bucket, but magically you notice that every single grain of sugar dissolves completely and you can't even see any evidence of it at the bottom. This would be an ideal mixture! It means that the sugar has mixed perfectly with the water and there is no excess or waste.
In science, an ideal mixture is when two or more substances mix together perfectly without any waste or excess. This is often seen in things like alloys, where different metals are combined to make a stronger material, or in air where oxygen and nitrogen are perfectly mixed for us to breathe.
So, that's what an ideal mixture means, kiddo! It's kind of like the perfect combination of different things mixed together where everything is balanced and works well together.