Explain why, in a test for sulfate ions, the sample is acidified with hydrochloric acid first. Carbonate ions also produce a white precipitate with barium chloride solution. The acid reacts with ...

Green water and algae blooms are normally a sign of bad water quality. So, does that mean clear water is cleaner? Not always. Chloride is an invisible pollutant that’s doing irreparable ...

Chloride pollution comes from salts and is seemingly unnoticeable without testing the water ... Water softeners work by ion exchange. They use resin beads to replace calcium and magnesium ions ...