solution

A solution is a uniform mixture — one where the components are spread so evenly that nothing separate can be seen, even under a microscope.

• Homemade ORS is a perfect everyday example: sugar and salt dissolve so completely and evenly through water that every sip tastes identical, whether it's the first or the last.
• Solutions aren't limited to solids dissolving in liquids — two liquids can form a solution too, and even gases like oxygen dissolve into water to form one.
• What makes a solution special compared to a non-uniform mixture like sand in water is that nothing settles out and nothing separates visibly, no matter how long you wait or how closely you look.
• Every solution has two roles to fill — something doing the dissolving, and something getting dissolved — which is exactly what the terms solute and solvent describe.