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If I add a second teabag to a cup, how much the concentration of tea in the cup increases?

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  • $\begingroup$ There appears to be a solubility limit for tea in water, so if you hit that concentration limit then adding a second teabag into a cup of tea won't increase the concentration at all. See, for instance : cooking.stackexchange.com/questions/41413/… $\endgroup$ – Samuel Weir Oct 4 '17 at 21:51
  • $\begingroup$ What exactly do you mean by concentration? Normally I'd take it to mean something to do with proportion of the liquid you're referring to to total mixture, but this isn't overly well defined for the simple term 'tea'. In other words, tea contains different chemicals, such as caffeine, tannins and other phenols and polyphenols (essentially, where the taste and flavour comes from) - is there a specific one of these that you're referring to? $\endgroup$ – Mithrandir24601 Oct 4 '17 at 21:55
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It will nearly double. A mug of boiling hot water can take at least 10 teabags before saturating. As water cools down, the strong solution becomes less clear due to a sediment forming, because cooler water can't dissolve as much as hot water. This effect is behind the tea preparation method where a very strong tea made in a small pot is diluted with water before drinking. Bitter tea ingredients are less soluble thus yielding a better flavor with this method.

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Tl;dr It depends.

The water will dissolve 'tea flavor' until either the tea bag runs out or until the water is saturated with flavor. Hotter water can generally dissolve more. The more water in the cup the more likely the tea bag will run out. If the water is saturated, the second teabag will have no effect.

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