Acids
* Hydrogen Ion (H+): This is the defining characteristic of an acid. Acids donate hydrogen ions in solution.
* Common Anions:
* Halides (Cl-, Br-, I-): Found in hydrochloric acid (HCl), hydrobromic acid (HBr), and hydroiodic acid (HI).
* Nitrate (NO3-): Found in nitric acid (HNO3).
* Sulfate (SO4^2-): Found in sulfuric acid (H2SO4).
* Phosphate (PO4^3-): Found in phosphoric acid (H3PO4).
* Carbonate (CO3^2-): Found in carbonic acid (H2CO3).
Bases
* Hydroxide Ion (OH-): This is the defining characteristic of a base. Bases produce hydroxide ions in solution.
* Common Cations:
* Alkali Metals (Li+, Na+, K+, Rb+, Cs+): These form strong bases like lithium hydroxide (LiOH), sodium hydroxide (NaOH), potassium hydroxide (KOH), etc.
* Alkaline Earth Metals (Ca^2+, Sr^2+, Ba^2+): These form strong bases like calcium hydroxide (Ca(OH)2).
Important Notes:
* Strength vs. Concentration: It's crucial to distinguish between acid/base *strength* and *concentration*.
* Strength refers to how readily a substance donates or accepts protons (H+ ions). Strong acids/bases completely ionize in solution.
* Concentration refers to the amount of acid/base dissolved in a given volume of solution.
* Other Important Ions: While the ions listed above are the most common, there are other ions that can be involved in acid-base chemistry, such as the ammonium ion (NH4+).
Let me know if you have any other questions!
