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Why do mashed potatoes stay white

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1. A freshly cut potato turns brown when left standing. Why do mashed potatoes stay white?

2. Lemon juice, which has a pH of about 3, can be sprinkled on freshly cut fruit to keep it from turning brown. Propose a hypothesis to explain this observation.

2a. How could you test your hypothesis?

2b. Propose an alternative hypothesis. (Hint: Lemon juice is a complex substance) 

Reference no: EM132486374

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