Hooked On Science – Color Changing Strawberry Jam

SCIENCE SAFETY
PLEASE follow these safety precautions when doing any science experiment.
• ALWAYS have an adult present.
• ALWAYS wear the correct safety gear while doing any experiment.
• NEVER eat or drink anything while doing any experiment.
• REMEMBER experiments may require marbles, small balls, balloons, and other small parts. Those objects could become a CHOKING HAZARD. Adults are to perform those experiments using these objects. Any child can choke or suffocate on uninflated or broken balloons. Keep uninflated or broken balloons away from children.

INGREDIENTS
• Strawberry Jam
• Vinegar
• Ammonia
• Hot Water
• Clear Plastic Cup

INSTRUCTIONS
STEP 1: Fill the clear plastic cup 3/4 of the way with hot water. Add five tablespoons of strawberry jam to the hot water and mix. Describe and classify the mixture by using its observable properties.
STEP 2: Add two tablespoons of ammonia to the clear plastic cup, mix, and observe. Explain how the strawberry jam can be used to help identify the mixture by its properties.
STEP 3: Add three tablespoons of vinegar to the clear plastic cup, mix, and observe. Explain how the strawberry jam can be used to help identify the mixture by its properties.

EXPLANATION
The strawberry jam is a pH indicator, which is a substance that indicates the degree of acidity or basicity through a color change. When the ammonia is added, the color changes to purple, which indicates the ammonia is a base. When the vinegar is added, the color changes to red, which indicates the vinegar is an acid.

Download these instructions here and check the Hooked on Science page for more science experiments.

Categories: Hooked On Science

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