= Magdalena Wajrak
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<Magdalena Wajrak> co-prepared chemical demonstrations connecting visible observations with balanced reaction chemistry. A zinc–<copper>-sulfate comparison distinguishes a reacting metal-<salt> pair from a zinc-sulfate control.
The control helps assign the colour and deposit changes to the proposed <redox> transformation. An observation becomes more informative when a comparison excludes a simpler explanation.<Chemical Demonstrations Booklet by Magdalena Wajrak and Tim Harrison>[Demonstration 16, pages 32–33]{ref}
Her https://www.ecu.edu.au/schools/science/staff/profiles/senior-lecturers/dr-magdalena-wajrak[institutional profile] identifies her as a <chemist> whose research areas include <electrochemistry> and theoretical <chemistry>.
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