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| In chemistry, pH, historically denoting "potential of hydrogen", is a scale used to specify the acidity or basicity of an aqueous solution. |
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| In chemistry, pH, historically denoting "potential of hydrogen", is a scale used to specify the acidity or basicity of an aqueous solution. |
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| having a sharp, sometimes unpleasant, taste or smell, like a lemon, and not sweet |
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| If metal corrodes, or if something corrodes it, it is slowly damaged by something such as rain or water |
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| something that shows what a situation is like |
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| the bottom part of an object, on which it rests, or the lowest part of something |
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| Someone who is bitter is angry and unhappy because they cannot forget bad things that happened in the past |
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| the act of making a substance neutral (= not an acid or an alkali) |
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| a common white substance found in sea water and in the ground, used especially to add flavour to food or to preserve it |
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| If something is slippery, it is wet or smooth so that it slides easily or causes something to slide |
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