Solubility Rules Pre-IB Chemistry

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Last updated 8:50 PM on 5/20/26
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10 Terms

1
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Ammonium(NH4^+) and Group 1A

Salts of Ammonium(NH4^+) and Group 1A Always soluble

<p><strong>Salts of </strong>Ammonium(NH4^+) and Group 1A <strong>Always soluble</strong></p>
2
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Chlorides?

Soluable except for AgCl, Hg2​Cl2​, and PbCl2​ are insoluble (Rule 2a).

<p>Soluable except for <strong>AgCl, Hg</strong><span><strong>2</strong></span><strong>​Cl</strong><span><strong>2</strong></span><strong>​, and PbCl</strong><span><strong>2</strong></span><strong>​</strong><span> are insoluble (Rule 2a).</span></p>
3
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Bromides

Soluable except for AgBr, Hg2​Br2​, HgBr2​, and PbBr2​ are insoluble (Rule 2b).

<p>Soluable except for <strong>AgBr, Hg</strong><span><strong>2</strong></span><strong>​Br</strong><span><strong>2</strong></span><strong>​, HgBr</strong><span><strong>2</strong></span><strong>​, and PbBr</strong><span><strong>2</strong></span><strong>​</strong><span> are insoluble (Rule 2b).</span></p>
4
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Iodides

All soluble except for AgI, Hg2​I2​, HgI2​, and PbI2​ are insoluble (Rule 2c).

<p>All soluble except for <strong>AgI, Hg</strong><span><strong>2</strong></span><strong>​I</strong><span><strong>2</strong></span><strong>​, HgI</strong><span><strong>2</strong></span><strong>​, and PbI</strong><span><strong>2</strong></span><strong>​</strong><span> are insoluble (Rule 2c).</span></p>
5
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Chlorates, nitrates, and acatate’s are?

They are soluble (Rule 3).

<p><span>They are </span><strong>soluble</strong><span> (Rule 3).</span></p>
6
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Sulfates?

Soluable except CaSO4​, SrSO4​, BaSO4​, Hg2​SO4​, HgSO4​, PbSO4​, and Ag2​SO4​ are insoluble (Rule 4).

<p>Soluable except <strong>CaSO</strong><span><strong>4</strong></span><strong>​, SrSO</strong><span><strong>4</strong></span><strong>​, BaSO</strong><span><strong>4</strong></span><strong>​, Hg</strong><span><strong>2</strong></span><strong>​SO</strong><span><strong>4</strong></span><strong>​, HgSO</strong><span><strong>4</strong></span><strong>​, PbSO</strong><span><strong>4</strong></span><strong>​, and Ag</strong><span><strong>2</strong></span><strong>​SO</strong><span><strong>4</strong></span><strong>​</strong><span> are insoluble (Rule 4).</span></p>
7
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Phosphates and carbonates?

Insoluble except for NH4+ and Group 1A compounds (rule 5)

<p>Insoluble except for NH4+ and Group 1A compounds (rule 5)</p>
8
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Metal oxides (O^-2)

Insoluble except for NH4+​ and Group IA compounds (Rule 6).

<p>Insoluble except for <strong>NH</strong><span><strong>4+</strong></span><strong>​</strong><span> and </span><strong>Group IA</strong><span> compounds (Rule 6).</span></p>
9
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Metal Hydroxides (OH-)

Insoluable except for: They are soluble when combined with NH4+​, Group IA, and Group IIA from calcium down (Rule 7).

<p>Insoluable except for: <span>They are soluble when combined with </span><strong>NH</strong><span><strong>4+</strong></span><strong>​</strong><span>, </span><strong>Group IA</strong><span>, and </span><strong>Group IIA from calcium down</strong><span> (Rule 7).</span></p>
10
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Sulfides (S^-2)?

insoluble except when: They are soluble when combined with NH4+​, Group IA, and Group IIA (Rule 8)

<p>insoluble except when: <span>They are soluble when combined with </span><strong>NH</strong><span><strong>4+</strong></span><strong>​</strong><span>, </span><strong>Group IA</strong><span>, and </span><strong>Group IIA</strong><span> (Rule 8)</span></p>