When exploring amphoteric definition and examples, it's essential to consider various aspects and implications. How do we know if a compound is amphoteric or not?. Sorry to tell you but your teacher's opinion is not right, just because the "react" is not enough. You may say that if an oxide reacts with an acid and forms a salt or if an oxide reacts with a base forms a salt then you can say that it is an amphoteric oxide.
In this context, take an example of aluminum oxide, when dissolved in HCl it will form aluminium chloride, but we can also dissolve it in NaOH, where it ... inorganic chemistry - Why is beryllium hydroxide amphoteric .... Don't get hung up on the distinction between "basic" and "amphoteric" metal hydroxides.
This perspective suggests that, the difference between beryllium hydroxide and "basic" metal hydroxides like magnesium hydroxide is less than meets the eye; under the right conditions just about any metal hydroxide can act as as acid, even sodium hydroxide [1]: Sodium amide, NaNH2, has recently been shown to be a useful catalyst to ... Determining whether something is an acid, base, or amphoteric. This perspective suggests that, why is Aluminium oxide amphoteric? - Chemistry Stack Exchange. The result indicated conclusively that In (OH)3 is only slightly amphoteric, being much more basic than acidic. Also, on the Wikipedia page for indium oxide it clearly states that this oxide is soluble in acids but not in alkali.
Furthermore, why does adding excess NaOH prove amphoteric nature?. So, why is a species amphoteric if it forms a white precipitate after reacting with hydroxide ions, then dissolves after adding an excess? An example of a problem is: "how do you prove lead (II) hydroxide is amphoteric, whereas magnesium hydroxide is not?" Similarly, how to decide acidic or basic nature of oxides.
How can we theoretically decide the acidic or basic nature of an oxide? What are the reasons/ factors which make an oxide acidic, basic, amphoteric or netural? Simple Oxides - Amphoteric Oxides, Acidic and Basic Oxides - Toppr. Simple Oxides carries a number of oxygen atoms that normal valency of its metal allows. It's important to note that, types of oxides are Amphoteric oxides, Acidic Oxides, Basic Oxides.
How can we tell if an ion is amphiprotic [closed]. If you show these three ions (as written) to a super intelligent being person who never took chem or physics, they will not be able to tell you which ion is amphoteric. In short, there is no simplr short-cut! This requires some knowledge of some formula writing conventions.
It's important to note that, for simple inorganic ions, if H is written with a p-block element, that H is ionizable and it is an acid ... Why is Cr2O3 amphoteric but CrO not? I faced a question where I had to find the amphoteric oxides among some given oxides.
The answer key says $\\ce{Cr2O3} $ is amphoteric but $\\ce{CrO}$ isn't. Amphoteric character of V2O5 - Chemistry Stack Exchange.
📝 Summary
As discussed, amphoteric definition and examples stands as a valuable field worthy of attention. Looking ahead, additional research on this topic may yield deeper knowledge and advantages.