A relatively common winemaking problem is the presence of hydrogen sulfide (H2S(aq)) in the wine. You know it when its there because hydrogen sulfide smells like rotten eggs and it only takes a tiny amount of it to make the wine stinky. One thing that is sometimes used to remedy the situation is the addition of copper(II) sulfate. This immobilizes the sulfide ions in the form of an insoluble product, CuS(s), that can then be removed by filtration. Given the density of wine as 0.967 g/mL, if 5.0 gallons of wine contains 25 ppm of H2S, what mass of copper(II) sulfate pentahydrate must be added to remove the smell by precipitation of all of the sulfide ions?

A student is given the following labeled solutions: NaCl, AgNO3, FeCl2, HCI, and KaCo The data was collected and summarized in the following table. The student then receives 5 test tubes labeled A, B, C, D, and E, which contain the five solution above. Data collect after mixing these solutions are given in the second table below. 4. FeCl2 HCI NaCI AGNO, Precipitate Şolution K;CO, Precipitate Gas forms No reaction XXXXX forms K½CO; forms XXXXX Precipitate Precipitate Precipitate Precipitate XXXXX XXXXX AgNO; forms forms forms forms Precipitate No Reaction No reaction XXXXX XXXXX NaCl No reaction forms Precipitate No reaction ХXXXX XXXXX Precipitate No reaction FeCl forms forms Precipitate No reaction No reaction HCI Gas forms XXXXX forms XXXXX Solution A B D A XXXXX No reaction Precipitate Precipitate No reaction XXXXX forms forms B No reaction XXXXX Gas forms Precipitate No reaction XXXXX forms C Precipitate Gas forms Precipitate No reaction XXXXX XXXXX forms forms Precipitate…

6. An aqueous solution containing Ca2+, Cl-, CO32-, and NO3- is allowed to evaporate.  Which compound will precipitate first?

CaCl2(aq) + 2 AgNO3(aq) ⟶Ca(NO3)2 + 2 AgCl   Fill in the blanks with either an (s) or an (aq) to indicate the phase of each product. Use the Solubility Rules.