The ammonia gas, having a lower molecular weight than the hydrogen chloride, will diffuse faster and travel a greater length of the tube. Consequently, the white ring of ammonium chloride will form ...

Researchers present a solution to the challenging problem of recycling poly-cotton textile waste. The process starts with fully removing all cotton from the fabric using superconcentrated hydrochloric ...

Unlike the other tests described on this page, the test for carbonate ions works whatever acid is added. Explain why, in a test for sulfate ions, the sample is acidified with hydrochloric acid first.