Did you like your last practice in the lab? The challenge consisted on guess which substance was on each test-tube: you can use litmus paper, red cabbage juice and your sense of smell! The colours obtained are wonderful and they will help us to predict the susbtances, considering their acid-base properties: bleach? ammonia? hydrochloric acid? Human urine (dilution)?
Here's an interesting report of the practice: thanks Claudia, nice pictures!
