The instructions from the new, soon-to-be-released manual for the chemistry merit badge say the indicator can be made by ...

Copper sulfate has been used in agriculture since the 1800s, at least. In the U.S. it is widely used as a fungicide on organic and conventional crops, and it is also found in some fertilizer products.

Speaker one Our base in this case is copper oxide which will react with sulfuric acid to give us copper sulfate and water. Speaker two This is the equipment that you’ll need. Pause and take a look.

In fact, copper sulfate is classified as harmful if swallowed and can cause serious eye damage. So make sure you are wearing gloves and safety goggles. Speaker one Now, ...