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amphoteric    
a. 两性的

两性的

amphoteric
adj 1: having characteristics of both an acid and a base and
capable of reacting as either [synonym: {amphoteric},
{amphiprotic}] [ant: {acidic}, {alkalic}, {alkaline}]


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  • How do we know if a compound is amphoteric or not?
    However, we can broaden this definition further (good for advanced classes) One formal definition is "A chemical species that behaves both as an acid and as a base is called amphoteric This property depends upon the medium in which the species is investigated: H2SO4 is an acid when studied in water, but becomes amphoteric in superacids "
  • Amphoteric character of V2O5 - Chemistry Stack Exchange
    The phrase "amphoteric though mainly acidic" means the species has more of an acidic character than a basic character the rule of thumb is that with increasing metal oxidation state, the oxide basicity gets weaker and acidity stronger See: Why is Cr2O3 amphoteric but CrO not? Now focusing on $\ce{V2O5}$ Yes, it is amphoteric but it has a
  • Determining whether something is an acid, base, or amphoteric
    An amphoteric substance can act both as an acid and a base That is, an amphoteric substance can donate protons and also accept protons $\ce{CO3^{-2}}$ does not have any protons so it cannot act as an acid It is the conjugate base of $\ce{HCO3^{-}}$ $\ce{HPO4^-{2}}$ is the conjugate base of $\ce{H2PO4^{-}}$
  • Why is Aluminium oxide amphoteric? - Chemistry Stack Exchange
    Hence, an amphoteric oxide slightly tending towards the basic end seems reasonable for indium(III) oxide The reaction between acid and $\ce{In2O3}$ should follow the general scheme that is illustrated above for $\ce{Al2O3}$ and $\ce{HCl}$ , and should yield similar products
  • acid base - Is aluminium amphoteric? - Chemistry Stack Exchange
    Is aluminium amphoteric? Ask Question Asked 8 years, 4 months ago Modified 4 years, 2 months ago
  • Can strong acids be amphoteric? - Chemistry Stack Exchange
    There are amphiprotic (or amphoteric) substances, like $\ce{H2O}$ and $\ce {HCO3-}$, which act both as an acid and base
  • Why is Cr2O3 amphoteric but CrO not? - Chemistry Stack Exchange
    The amphoteric character of chromium(III) is stated in its Wikipedia article: Chromium(III) oxide is amphoteric Although insoluble in water, it dissolves in acid to produce hydrated chromium ions, $\ce{[Cr(H2O)6]^3+}$ which react with base to give salts of $\ce{[Cr(OH)6]^{3−}}$
  • How do you explain the amphoteric behaviour of amino acids? - Toppr
    This zwitter ionic form of $$\alpha$$ amino acid shows amphoteric behaviour, i e act both as acid and base
  • Why does adding excess NaOH prove amphoteric nature?
    I choose the most suitable amphoteric compound in this senario as the neutral precipitate, $\ce{M(H2O)3(OH)3}$ because it can shows the rest of amphoteric compounds in the series For instance, according to the IUPAC description, this precipitate is an amphoteric compound because it will react with both acids and bases (as Mithoron pointed out
  • Calculating pH of diprotic and amphoteric solutions
    (A) Why amphoteric (B) How to solve the problem without making unexplained assumptions (C) Why the solution in the book uses the approximate equality $\ce{[H3AsO4]=[HAsO4^{2-}]}$ PART (A) An amphoteric species (molecule or ion) is one that can either gain a proton with relative ease, or lose a proton with relative ease





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