The concentration of Cu2+ ions in the water (which also contains sulfate ions) discharged from a certain industrial plant is determined by adding excess sodium sulfide (Na2S)solution to 0.800L of the water.
The molecular equation is:
Na2S (aq) + CuSO4 (aq) ----> Na2SO4 (aq) + CuS (s)
Write the net ionic equation and calculate the molar concentration of Cu2+ in the water sample if 0.0177g of solid CuS is formed.