A copper sulfate solution is made from 2.4g of copper sulfate dissolved in 250cm3 of water. What is the concentration of the copper sulfate solution in gdm−3?

False, it's not only for acids. I've put alkalis and phenolphthalein (an indicator that goes colourless in the presence of acid) into the beaker and had an acid in the burette.

What a titration actually does is calculates the exact amount of one solution that reacts with a different one.
Whatever happens, you need to know the substances are pure, and the concentration/volume of the substance in the burette.