why do orange juice taste bitter after we brush our teeth(with toothpaste)?

Question

actually, it comes from a tv show. i don't know how to describe the taste. it taste like bitter, but.... ARGH!
but hey, does it have to do with acid and alkaline? coz orange juice is acidic, whereas toothpaste is alkaline?
if ya wanna know what the taste is, just try it. a word of wise : it taste REALLY FUNNY.

Answer 1

You've done a pretty good job of answering your own question. Now, you've really got to work on your writing skills.

Most toothpaste formulae contain a base (or alkaline) to neutralize the acidic substance that exists in the mouth. Consequently, when orange juice (or any other juice that contains citric acid) is consumed, the contrast between the lingering effects of the base react with the newly ingested acid to produce an unusual taste. But, notice that as you drink more juice, the more liekly it is to taste "normal." That's because the toothpaste base has a minimal and temporary effect.

Answer 2

I hadn't thought of it in terms of an acid vs alkaline contrast, but you may be onto something. It may simply be that the toothpaste is comparatively sweeter than the orange juice - if you sucked a lemon and then had a mouthful of orange juice, the OJ would probably taste syrupy sweet.

Answer 3

well according to me orange juice contains citric acid which reacts with the calcium present in the toothpaste which happens to be alkaline hence it gives a tangy taste