Acids and Base [ENDORSED]

[Ivan_Tang_2G]

How can I tell which is the Acid and which is the Base?

[Tylina Guo 1K]

Acids are able to donate an H+, or accept electrons, while bases can accept H+ or donate electrons. So, you would look at the chemical formula to determine whether a molecule is able to accept or donate either of these. For example, HF can donate an H+, turning it into its conjugate base, F-.

[Sanjana Narayanan 2J]

Adding on to the previous answer, depending on the definition you are using, acids and bases are defined differently. The Bronsted-Lowry definition is the one that says acids donate H+ ions and bases accept H+ ions. The Lewis definition says that acids accept lone pairs of electrons and bases donate lone pairs of electrons.

[Grace_Wu]

Depend on the situation, for if you want to have a Lewis acid/base and Bronsted acid/base . For Lewis acid/base, they are defined as lone pair acceptor or lone pair donor. For Bronsted acid/base, it gives off proton or accept a proton.
Hope this helps.

[Sidharth Paparaju 3B]

The proton donor is an acid while the proton acceptor is the base (for bronsted acids).