Question

part b
carry out these steps, and record your findings in the table.
material changes red cabbage juice to what color? is the material an acid or an alkali?
white vinegar
water
ammonia
lemon juice
citrus cleaner
milk
dishwasher soap

Explanation:

Step1: Recall acid - base indicator properties

Red cabbage juice is an indicator. Acids turn it red - pink and alkalis turn it blue - green.

Step2: Analyze each material

• White vinegar: It is an acid. It will turn red cabbage juice red - pink.
• Water: It is neutral. It will keep red cabbage juice close to its original purple color.
• Ammonia: It is an alkali. It will turn red cabbage juice blue - green.
• Lemon juice: It is an acid. It will turn red cabbage juice red - pink.
• Citrus cleaner: Usually acidic, will turn red cabbage juice red - pink.
• Milk: Slightly acidic, will turn red cabbage juice red - pink.
• Dishwasher soap: Usually alkaline, will turn red cabbage juice blue - green.

Answer:

Material	Changes red cabbage juice to what color?	Is the material an acid or an alkali?
Water	Purple (close to original)	Neutral
Ammonia	Blue - green	Alkali
Lemon juice	Red - pink	Acid
Citrus cleaner	Red - pink	Acid
Milk	Red - pink	Slightly acidic
Dishwasher soap	Blue - green	Alkali