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Chapter 2 - Models Of Bonding & Structure

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Atom Symbol

Chapter 1 - Models Of The Particulate Nature Of Matter

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 Globe with Meridians

Chapter 3 - Classification Of Matter

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Fire

Chapter 4 - What Drives Chemical Reactions?

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Rocket

Chapter 5 - How Much, How Fast & How Far?

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Test Tube

Chapter 6 - What Are The Mechanisms Of Chemical Change?

<ul>
	<li>Ionic compounds are made up of positively charged particles (cations) and negatively charged particles (anions) attracted to each other. Think of them as BFFs who just can&#39;t stay away from each other!</li>
	<li>They form a unique pattern called a lattice. It&#39;s like an ultra-complex, 3D game of Tetris!</li>
</ul>


<ul>
	<li>Volatility describes how likely a substance is to turn into a gas. Ionic compounds are introverts - they don&#39;t like to &#39;fly&#39; or vaporize much!</li>
	<li>To make an ionic compound &#39;fly&#39; or turn into gas, you need to overcome the strong forces holding the ions together (it&#39;s like pulling apart two very close friends!). That&#39;s why they&#39;re called nonvolatile.</li>
	<li><strong>Fun Fact</strong>: Their strong bond also means they have high boiling and melting points. For instance, the melting point of sodium chloride (aka table salt) is around 1075K. That&#39;s hot enough to melt lead!</li>
</ul>


<ul>
	<li>Substances need mobile charged particles to conduct electricity. Remember the BFFs (ions) in ionic compounds? They can&#39;t move around much in a solid state, so they don&#39;t conduct electricity.</li>
	<li>But when they&#39;re molten or dissolved in water, they can move freely and conduct electricity! Think of it as a dance party where everyone&#39;s freely grooving around!</li>
</ul>


<ul>
	<li>Solubility is about how well a substance dissolves. Ionic compounds typically dissolve well in polar solvents like water, but they snub non-polar solvents like hexane.</li>
	<li>Water molecules have different charges on different atoms - partially negative on oxygen, and partially positive on hydrogen. When you add an ionic compound to water, the water molecules reorient themselves to surround and pull out the individual ions from the lattice.</li>
	<li>The mechanism is different in non-polar solvents, where there&#39;s no attraction between the ions and solvent molecules, so the ions stay together.</li>
	<li>However, some ionic compounds just don&#39;t dissolve in water. This is because the attraction between the cations and anions in the lattice is stronger than their attraction to water molecules. Examples are calcium carbonate (used in antacids for heartburn) and silver chloride (used in photographic film).</li>
</ul>

<p>So next time you sprinkle some salt on your fries, remember, you&#39;re witnessing the wonders of ionic compounds in action!</p>


Unlocking Ionic Compounds: Properties, Volatility & Solubility

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Standard Level

Chemistry SL

Chapter 2 - Models Of Bonding & Structure

Unlocking Ionic Compounds: Properties, Volatility & Solubility

Table of content

Ionic compounds & their unique structure

Volatility of ionic compounds

Unlock the Full Content!

Chapter 2 - Models Of Bonding & Structure

Unlocking Ionic Compounds: Properties, Volatility & Solubility

Table of content

Ionic compounds & their unique structure

Volatility of ionic compounds

Unlock the Full Content!