Question #1e810

1 Answer
SupernovaT
Nov 22, 2017

The Kroger Brand has Sodium Benzoate in it and thus responds to the magnetic field applied to the petri dish.

Explanation:

The Kroger Brand green food colouring has has Sodium Benzoaten in it that has sodium (#Na^+#) Ion in it which is susceptible to the magnetic field and will align itself accordingly, the other food colouring does not have sodium benzoate and thus no 'free' metal ion that can be influenced by the magnetic field.

Sodium Benzoate C7H5 Na O2

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