"Complete Meter Stick Optics Bench"

Draw on a piece of filter paper by utilizing an electrolytic redox reaction with different colored 'ink'.

Explain the principle of high surface tension as water acts like a membrane stretched across the surface preventing sulfur particles from sinking.

Understand acid base indicators and complex ions.

Observe color changes through chemical redox reactions of complex ions.

Produce a bright-green iron compound in this multi-step synthesis.