Water's amphoteric behavior means it can act as which of the following?

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Multiple Choice

Water's amphoteric behavior means it can act as which of the following?

Explanation:
Amphoteric substances can both donate and accept protons. Water fits this role because it can act as a base when reacting with acids by accepting a proton to form H3O+, and it can act as an acid when reacting with bases by donating a proton to form OH-. For example, HCl + H2O → H3O+ + Cl− shows water behaving as a base, while NH3 + H2O ⇌ NH4+ + OH− shows water behaving as an acid. Even in pure water, self-ionization 2 H2O ⇌ H3O+ + OH− reflects its ability to participate as both acid and base. Thus, it can act as both an acid and a base.

Amphoteric substances can both donate and accept protons. Water fits this role because it can act as a base when reacting with acids by accepting a proton to form H3O+, and it can act as an acid when reacting with bases by donating a proton to form OH-. For example, HCl + H2O → H3O+ + Cl− shows water behaving as a base, while NH3 + H2O ⇌ NH4+ + OH− shows water behaving as an acid. Even in pure water, self-ionization 2 H2O ⇌ H3O+ + OH− reflects its ability to participate as both acid and base. Thus, it can act as both an acid and a base.

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