Amphoteric

[Annabella_Amato_1I]

How can you tell if a molecule is amphoteric or not?

[KatarinaReid_3H]

The most common examples are carbonic acid, sulfuric acid, and water.
For H2CO3, once it has lost one proton, it can either further lose more and act as an acid, or it can gain one back like a base would.
H2SO4 does the same thing as carbonic acid
Water can either give up a proton to become OH- or gain one like a base and become a hydronium ion.
Hope this helps

[Brandon Pham 1H]

Amphoteric substances can act as both an acid and base (donate and accept protons AKA H+). A classic example would be H20. It can donate a proton to become OH- or accept a proton to become H30+

[Madison Wong 3H]

Amphoteric substances can act as either acids or bases, I think lavelle also said that the amphoteric substances often align with the diagonal band of metalloids, but that it doesn't match up perfectly.

[Q Scarborough 1b]

As stated before, Amphoteric substances can act as either acids or bases. The generally follow the same diagonal pattern as the metalloid band but do not line up exactly.

[Joshua Eidam 2A]

Amphoteric substances can act as either acids or bases, I think lavelle also said that the amphoteric substances often align with the diagonal band of metalloids, but that it doesn't match up perfectly.

Can you clarify more on the "aligning with the diagonal band of metalloids"? Was he suggesting that typically these metalloids are included in most Amphoteric molecules?

[josephspindler2H]

I think in terms of what we will be exposed to in this course, we can determine if something is amphoteric based on what it is being exposed to. The outcome can tell us if it is amphoteric. I believe it is helpful know some of the most common ones, such as water.

[BKoh_2E]

One of the UAs mentioned that most of the metalloid oxides such as Al2O3 are amphoteric.

[Lorraine Jiang 2C]

Hi! I think professor Lavelle mentioned in the lecture that the amphoteric compounds mostly line up with the metalloids in the periodic table. Some examples are H2O and Al2O3.

Hope it helps!

[Xavier Herrera 3H]

Amphoteric compounds can act as either acids or bases depending on what they're exposed to. Polyprotic acids are common examples of this, since they can gain or lose an H+ depending on the situation. H2O is also a common example since it can gain H+ to become H3O+, or lose an H+ to become OH-.

[Muskaan Abdul-Sattar]

Amphoteric compounds are characterized by their ability to act as both acids and bases! H2O is a great example.

[DavidTabib 3H]

Anything that can lose or add an H+ is considered amphoteric, such as H20.