I took this photo of the water after I’d steamed some red cabbage at the weekend because I thought it was such a beautiful colour.

And then I got to wondering what chemistry is going on that means that a lovely deep red cabbage produces blue water (with slight hints of green –it was bluer in reality than the picture shows –more photography practice for me). It turned out to be pretty simple and a quick bit of googling lead me to the answer.

It’s all about the pH of the water – and in fact red [...]

Continue reading A little bit of chemistry