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I had an argument with a friend about this question. He says it is not an acid But I think it is as it itself can increase the pH value.

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    $\begingroup$ This is an un-question. If you argue about it or have an opinion on it, then you are wrong. $\endgroup$ – Ivan Neretin Nov 21 '20 at 10:11
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    $\begingroup$ Not to complicate things but the "hydrogen ion" is one of the fundamental particles - our friend the proton. $\endgroup$ – Hal Nov 21 '20 at 14:47
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    $\begingroup$ @Hal technically, since protons are composed of the fundamental particle, quarks, a proton would be considered a hadron. $\endgroup$ – dval98 Nov 21 '20 at 20:12
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    $\begingroup$ @DVAL98 Your point is well taken. The use of "fundamental particle" was not the best of terms. Given the discipline [chemistry not physics] and the apparent level of the question, it seemed helpful to make the point that a proton is one of the three particles most often discussed by chemists. It also helps make the point that H+ is never along, and hence emphasize the importance of the H3O+ discussion. $\endgroup$ – Hal Nov 22 '20 at 16:49
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    $\begingroup$ @Hal I apologize if that sounded pompous. In it was just semantics which can be annoying and your point was well delivered (and important). I just wanted to clarify for OP/future readers. The hard part of communication on online forums is trying to convey a point without seeming condescending. $\endgroup$ – dval98 Nov 22 '20 at 22:17

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