Why when i put to many spoonfuls of sugar in my tea some of it only dissolve?

When you add too many spoonfuls of sugar to your tea, you reach a point known as saturation, where the liquid can no longer dissolve any more sugar. At that point, the excess sugar will remain undissolved at the bottom of your cup. This occurs because the solubility of sugar in water is limited, and once that limit is exceeded, the sugar simply can't break down further into the solution.