Do oxides react react with a weak acid like phosphoric acid?

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SUMMARY

The discussion centers on the reactivity of various metal oxides, specifically Cr2O3, CuO, ZnO, PbO, CdO, NiO, SiO2, MgO, and CaO, when treated with phosphoric acid, a weak acid. It concludes that the reaction is not straightforward and may not lead to complete conversion, as the outcomes depend on the specific mixture and require experimental verification. The consensus emphasizes the importance of empirical testing over theoretical assumptions in determining the extent of reaction.

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Rub3y
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TL;DR
Do oxides react with phosphoric acid?
I have an ash which is a mix of oxides (Cr2O3, CuO, ZnO, PbO, CdO, NiO, SiO2, MgO, CaO). I am adding phosphoric acid. But as a weak acid, will it react with oxides? If so, are these conversions 100% or more of a equillibrium (partial conversion).

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This question is hardly different from the one you posted several days ago here. As you were told in the other thread there is no simple answer, and while you can probably find some pointers in the literature the only sure way (especially in the case of a specific mixture) is to check what happens experimentally.

I am locking the thread.
 
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I came.across a headline and read some of the article, so I was curious. Scientists discover that gold is a 'reactive metal' by accidentally creating a new material in the lab https://www.earth.com/news/discovery-that-gold-is-reactive-metal-by-creating-gold-hydride-in-lab-experiment/ From SLAC - A SLAC team unexpectedly formed gold hydride in an experiment that could pave the way for studying materials under extreme conditions like those found inside certain planets and stars undergoing...

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