The red cabbage indicator that I am using works fine. However it looks rather red, further investigation and starting discussion on Science Forums about this, suggested a cause and solution.

In essence the indicator is acidic, hence the read colour rather than the purple neutral colour.

I have now made up a new batch, which looks a lot better

The image above illustrates the old indicator on the right hand side, the new is in the beaker on the left. You can see quite a big difference in colour.

I have extracted the pH colour scale from the original infographic below

Video

There is a 3 min Video here that I made while making the new batch of indicator up.

• Add hot water to beaker
• Add red cabbage to water
• Mix (until water is the required purple colour)
• All to cool
• Add to regent bottle

Created more indicator as required.

Discussion

• Science Forum, discussion

Tags

#Chemistry,#HomeChemistry,#HomeChemistry15,#Science, #RedCabbageIndicator,#pH,#Scale,#Acid,#Alkali,#Neutral,#Color,#Scale