Give pohimichim home!
Before giving the answer to the questions in the previous post. Invited all interested parties at home brew the infusion of hibiscus (also known as the Sudanese rose or hibiscus) and look closely at the process of brewing. It can be seen that the infusion of hibiscus first turns blue, and changes to red.
Sprinkle a little to the solution of baking soda. How to change the color?
To this solution, add a few drops of vinegar, look for a color change? How can we explain these observations?