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<WRAP bigger fgred>Chemistry Resources</WRAP>
<WRAP muchbigger>Ions & Elements & Compounds, Oh My!</WRAP>
<WRAP>Elements & Compounds that may, or may not improve and/or destroy your day</WRAP>
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=====Common Polyatomic Ions by Charge=====
^2+^1+^1-^2-^3-^
|Mercurous => Ag<sub>2</sub>|Ammonium => NH<sub>4</sub>|Cyanide => CN | Carbonite => CO<sub>3</sub>|Phosphate => PO<sub>4</sub>|
|   |   |Hydrogen Carbonite => HCO<sub>3</sub>|Oxalate => C<sub>2</sub>O<sub>4</sub>|   |
|:::|:::|Acetate => C<sub>2</sub>H<sub>3</sub>O<sub>2</sub>|Chromate => CrO<sub>4</sub>|:::|
|:::|:::|Hypochlorate => ClO|Dichromate => Cr<sub>2</sub>O<sub>4</sub>|:::|
|:::|:::|Chlorite => ClO<sub>2</sub>|Peroxide => O<sub>2</sub>|:::|
|:::|:::|Chlorate => ClO<sub>3</sub>|Monohydrogen Phosphate => HPO<sub>4</sub>|:::|
|:::|:::|Perchlorate => ClO<sub>4</sub>|Sulfite => SO<sub>3</sub>|:::|
|:::|:::|Permanganate => MnO<sub>4</sub>|Sulfate => SO<sub>4</sub>|:::|
|:::|:::|Nitrite => NO<sub>2</sub>|Thiosulfate => S<sub>2</sub>O<sub>3</sub>|:::|
|:::|:::|Nitrate => NO<sub>3</sub>|   |:::|
|:::|:::|Hydroxide => OH|:::|:::|
|:::|:::|Dihydrogen phosphate => H<sub>2</sub>PO<sub>4</sub>|:::|:::|
|:::|:::|Hydrogen Sulfite => HSO<sub>3</sub>|:::|:::|
|:::|:::|Hydrogen Sulfate => HSO<sub>4</sub>|:::|:::|

=====Solubility Rules for Ionic Compounds=====
^Applies To^Rule^Exceptions^
|Li<sup>+</sup>, Na<sup>+</sup>, K<sup>+</sup>, NH<sub>4</sub><sup>+</sup>|Group IA elements and ammonium compounds are soluble|-|
|C<sub>2</sub>H<sub>3</sub>O<sub>2</sub>, NO<sub>3</sub>|Acetates and nitrates are soluble|-|
|Cl<sup>-</sup>, Br<sup>-</sup>, I<sup>-</sup>|Most chlorides, bromides, and iodides are soluble|AgCl, Hg<sub>2</sub>Cl<sub>2</sub>, PbCl<sub>2</sub>, AgBr, HgBr<sub>2</sub>, Hg<sub>2</sub>Br<sub>2</sub>, PbBr<sub>2</sub>, AgI, HgI<sub>2</sub>, PbI<sub>2</sub>|
|SO<sub>4</sub><sup>2-</sup>|Most sulfates are soluble|CaSO<sub>4</sub>, SrSO<sub>4</sub>, BaSO<sub>4</sub>, Ag<sub>2</sub>SO<sub>4</sub>, HgSO<sub>4</sub>, PbSO<sub>4</sub>|
|CO<sub>3</sub>|Most carbonates are insoluble|Group IA carbonates, (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub>|
|PO<sub>4</sub><sup>3-</sup>|Most phosphates are insoluble|Group IA phosphates, (NH<sub>4</sub>)<sub>2</sub>PO<sub>4</sub>|
|S<sup>2-</sup>|Most sulfides are insoluble|Group IA sulfides, (NH<sub>4</sub>)<sub>2</sub>S|
|OH<sup>-</sup>|Most hydroxides are insoluble|Group IA hydroxides, Ca(OH)<sub>2</sub>, Sr(OH)<sub>2</sub>, Ba(OH)<sub>2</sub>|

=====Common Strong Acids and Bases=====
^Acids^Bases^
|Perchloric acid => HClO<sub>4</sub>|Lithium Hydroxide => LiOH|
|Sulferic acid => H<sub>2</sub>SO<sub>4</sub>|Sodium Hydroxide => NaOH|
|Hydroiodic Acid => HI|Potassium Hydroxide => KOH|
|Hydrobromic Acid => HBr|Calcium Hydroxide => Ca(OH)<sub>2</sub>|
|Hydrochloric Acid => HCl|Sr(OH)<sub>2</sub>|
|Nitric Acid => HNO<sub>3</sub>|Barium Hydroxide => Ba(OH)<sub>2</sub>|