A balanced equation for CuSO4+NaCl--> ???

Answer 1

no reaction.
1. There is no precipitate (all of the possible combinations for products are soluble).
2. None of the possible products are gases.
3. None of the possible products are weak electrolytes; i.e., not 100% ionized.
4. No oxidation-reductions are going on
ergo: no reaction.