Part I

Add NaCl to your reaction mixture and heat it again.

mass of sodium chloride

The photo shows a small brown glass reagent bottle labeled “Sodium Chloride” held by a gloved hand next to a laboratory scale. On the scale is a wrinkled piece of weighing paper containing a small pile of barely visible clear, whitish solids. The screen on the scale reads “0.495 g.”

adding sodium chloride to dye solution

The video shows a small Erlenmeyer flask sitting in a sand bath. The flask contains a boiling stick and a moderate portion of brownish-black slurry. A piece of weighing paper is folded in half diagonally and its white crystalline contents poured into the flask. The mixture is then stirred with the boiling stick.

Cool the mixture to room temperature and then on ice.

cooled to room temperature

The photo shows a small Erlenmeyer flask clamped in midair. It contains a boiling stick and a moderate portion of reddish brown, clay-like solids.

in ice-water bath

The photo shows a small Erlenmeyer flask immersed in a large plastic tub filled with ice water. It contains a boiling stick, and while the rest of its contents are not fully visible through the ice, a dark reddish-brown color can be perceived.

after ice-water bath

The photo shows a small Erlenmeyer flask held above an ice water bath by a gloved hand. The flask contains a boiling stick and a moderate portion of reddish brown, clay-like solids. The sides of the flask are fogged by condensation.

Isolate and analyze the product.

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