How can you observe chemical change

Many objects in the everyday world do not change very much over time. However, when substances are mixed together, change is possible. [Pg.69]

Place a piece of zinc metal in a large test tube. [Pg.69]

Place the test tube in a ring stand and attach the clamp to a ring stand so that the mouth of the test tube is pointing away from you. [Pg.69]

Measure 10 ml of 3M hydrochloric acid in a graduated cylinder, and place it on the benchtop. WARNING HCI could cause bums and produce hazardous fumes. [Pg.69]

Light a wood splint with a match. Dispose of the match as directed by your teacher. Allow the wood to burn for 5 s, then blow out the flame to leave a glowing ember. [Pg.69]

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