Mystery #4Tier 2acids / chemistry
Why does red cabbage water change colour like magic?
Boil red cabbage and you get a purple water. Add a squeeze of lemon and it flushes pink; add some soap and it turns blue-green. No dyes, no tricks. What makes one purple liquid flip through a rainbow?

Your guess
What's your hunch: why does the cabbage water change colour depending on what you add?
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