I'm waiting to hear what she really mixed. If it was baking soda and vinegar this is ridiculous. If it was a strong acid and aluminum or bleach and ammonia, I could maybe understand this level of reaction.
Even then, there's no reported evidence of criminal intent...and she's being charged with a felony, yes?
They won't need to show mens rea (criminal intent) because it will never go to trial. They'll beat her over the head with the potential of a felony conviction until she agrees to plead guilty to a misdemeanor charge. It would be great to see a decent defense lawyer pick this case up and take it to trial.
Could have been baking soda and vinegar.
Last line in the article since it has been updated: "We've also obtained the police report from the incident. It shows that Wilmot was mixing toilet bowl cleaner and aluminum foil."