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Potassium hexacynoferrate (II)
Potassium hexacynoferrate II and copper sulfate form a precipitate and
produces a brown color. This is an indicator for:

A. Liquid
B. Metal
C. Copper
D. Potassium

Potassium hexacynoferrate II and ammonium sulfate produces a dark blue
color. This in an indicator for:
A. Gas
B. Liquid
C. Metal
D. Sublimation

In a chemical reaction, a “reagent” is a(n):
A. Chemical
B. Gentle reaction
C. Indicator
D. Catalyst

Making litmus solution and paper

Red litmus turns blue; that tells us that:
A. The sample is a base
B. The sample is an acid
C. The sample has a pH above 7
D. The sample needs to be sampled again

After using a chemical:
A. Tip it over so it can’t get knocked over. Make sure the top is off.
B. Leave the top off so the deadly fumes will leave the bottle

C. Replace the lid immediately and put it aside
D. Throw it away

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