柠檬汁实验英语作文500字左右
    Lemon Juice Experiment.
    Lemons are a common citrus fruit that is often used in cooking and baking. They are also a good source of vitamin C, which is an important antioxidant. In this experiment, we will investigate the effects of lemon juice on different substances.
    Materials.
    1 lemon.
    1 glass of water.
    1 piece of paper.
    1 piece of metal.
    1 piece of fabric.
    Procedure.
    1. Cut the lemon in half.
    2. Squeeze the juice of one half of the lemon into the glass of water.
    3. Dip the piece of paper into the lemon juice.
    4. Dip the piece of metal into the lemon juice.
    5. Dip the piece of fabric into the lemon juice.
    6. Observe the results.
    Observations.
    The paper turned yellow when it was dipped into the lemon juice. The metal turned green when it was dipped into the lemon juice. The fabric did not change color when it was dipped into the lemon juice.
    Conclusion.
    The results of this experiment show that lemon juice is an acidic substance. Acids can react with certain substances to change their color. In this experiment, the lemon juice reacted with the paper and the metal to change their color. The lemon juice did not react with the fabric because fabric is not made of a substance that reacts with acids.
    Applications.
    The results of this experiment can be used to explain a variety of everyday phenomena. For example, lemon juice can be used to:
    Remove stains from clothing.
    Clean metal surfaces.
    Brighten hair.
    Make lemonade.
react to后面加什么
    Safety Precautions.
    Lemon juice is an acidic substance and can cause skin irritation. Be sure to wear gloves when handling lemon juice. If lemon juice gets on your skin, rinse it off with water.

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