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How do you know when a chemical change has occurred

An indicator is a chemical that is added to the substances in a chemical reaction to show when change occurs. [Pg.281]

Chemical Reactions Make the following Foldable to help you organize information about how chemical reactions are classified. [Pg.281]

STEP 1 Fold a sheet of paper lengthwise, keeping the margin visible on the left side. [Pg.281]

Measure 10.0 ml of distilled water in a 25-mL graduated cylinder, and pour it into a 100-mL beaker. Using a pipette, add one drop of 0.1M ammonia to the water. [Pg.281]

Stir 15 drops of universal indicator into the solution with a stirring rod. Observe the solution s color. Measure its temperature with a thermometer. [Pg.281]


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Chemical changes

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