Red cabbage juice and litmus paper both serve as pH indicators, but they have different advantages. Red cabbage juice is natural, easy to prepare, and can provide a color spectrum for various pH levels. However, litmus paper is more standardized and offers quicker, more precise results for determining acidity or alkalinity. Ultimately, the choice depends on the context and the level of accuracy required.
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They are called indicators.
You will have made a pH indicator. Just like litmus paper.
Litmus paper, phenolphthalein, and red cabbage juice are substances that change color in response to changes in acidity or basicity. Litmus paper turns red in acid and blue in base, phenolphthalein is colorless in acid and pink in base, and red cabbage juice turns red in acid and blue in base.
Potato juice is typically neutral or slightly acidic, so if you test it with litmus paper, blue litmus paper will remain blue, and red litmus paper will remain red. This indicates that potato juice does not change the color of either type of litmus paper, reflecting its neutral pH.
You can use litmus paper or purple cabbage juice to test if a substance is acidic or not. Blue litmus paper turns red under acidic conditions. If you search 'litmus paper chart' online you can find some pretty good charts to find just how acid the substance is.
Blue litmus paper would turn red in orange juice.
Lemon juice is an acid therefore, it turns blue litmus paper red and red litmus paper remains red
Litmus paper would turn red if apricot juice, which is acidic, was dropped on it. This is because litmus paper turns red in the presence of an acid.
Lemon juice is an acid and blue litmus paper turns red when dipped in an acidic liquid.
Neither one is better than the other. Man-made and natural pH indicators do virtually the same exact thing, just with different materials.