Two unfinished statements about how an insoluble salt is prepared are given below. "……1…… may be used to make insoluble salts, such as ……2…… . The salt is obtained by ……3…… and is then ……4…… ." Which words fit gaps 1-4 correctly?
- Aprecipitation; barium nitrate; filtration; evaporated
- Bprecipitation; lead sulfate; evaporation; washed and dried
- Cprecipitation; lead sulfate; filtration; washed and dried
- Dtitration; barium nitrate; evaporation; washed and dried