How do you write aqueous solutions of copper(1) nitrate and potassium sulfide are mixed forming insoluble copper(1) sulfide?

The balanced chemical equation for this reaction is CuNO3(aq) + K2S(aq) -> Cu2S(s) + 2KNO3(aq). When aqueous solutions of copper(1) nitrate and potassium sulfide are mixed, a double replacement reaction occurs, forming insoluble copper(1) sulfide precipitate. This is a precipitation reaction where the insoluble product is separated from the solution.