What will happen if you mix Diet Coke and sugar?

Mixing Diet Coke and sugar will result in a sweetened beverage, as Diet Coke is artificially sweetened and contains no calories from sugar. The added sugar will dissolve in the liquid, potentially altering the taste and calorie content. However, the mixture may also create excess carbonation, leading to increased fizz and potential overflow if shaken or agitated. Overall, it will create a sweeter version of Diet Coke.