A curious property is to be observed when a crystal of pharmacosiderite is placed in a solution of ammonia - in a few minutes the green colour changes throughout the whole crystal to red; on placing the red crystal in dilute hydrochloric acid the green colour is restored.
hydrochloric הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד