Question

You add 55 grams of `KClO_3` to 60 grams of water that is at 90°C. How much water must you add to perfectly dissolve all of the `KClO_3`?

Answer 1

You have quoted no solubility data....

Explanation:

And potassium chlorate is a species that readily supersaturates....i.e. it is a substance that can exist in solution at GREATER than equilibrium quantities....I am willing to bet that it will all go up....but the question is unsound.