Ideal solution

When you mix two things together, like water and sugar, sometimes they mix very well and look like one thing, like when you make lemonade. Other times, they don't mix well and you can still see the separate parts, like when you mix oil and vinegar for salad dressing.

When things mix together really well and look like one thing, we call it an ideal solution. It's like they are the best of friends and really like being together. They don't want to separate and go their own ways.

This only happens with certain things though. For example, water and sugar make an ideal solution because they really like each other and want to stay together. However, oil and water don't like each other and will always separate, so they can't make an ideal solution.

Scientists like to study ideal solutions because they can help us make things like medicine and food taste better. When things mix well, it can make things easier to swallow and taste better, like when you mix sugar and water to make lemonade.