Ionic compounds generally are a non-metal with a metal e - spend more time around the more...
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![Page 1: Ionic compounds generally are a non-metal with a metal e - spend more time around the more electronegative (polyatomic) ion disproportional sharing.](https://reader033.fdocuments.us/reader033/viewer/2022051412/551b3931550346dd1a8b5284/html5/thumbnails/1.jpg)
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Ionic compounds generally are a non-metal with a metal
e- spend more time around the more electronegative (polyatomic) ion
disproportional sharing of electrons causes a (+ve) charged ion & (-ve) charge ion
The (+ve) & (-ve) ions form a lattice (a solid structure)
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Sodium ion
Water molecule Chlorine ion
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Q: What happens when this gets into water (a polar substance with + and -)?
A: The ions are pulled off by the water, with opposite charges attracting
![Page 5: Ionic compounds generally are a non-metal with a metal e - spend more time around the more electronegative (polyatomic) ion disproportional sharing.](https://reader033.fdocuments.us/reader033/viewer/2022051412/551b3931550346dd1a8b5284/html5/thumbnails/5.jpg)
Sodium ion
Water molecule
Chlorine ion
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http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/molvie1.swf
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NaCl (solid) + H2O (liquid) NaCl (aqueous)
Is there a simpler method to write this? Use symbols
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NaCl(s) NaCl(aq) Molecular Equation
OR
NaCl(s) Na+(aq) + Cl- (aq) Ionic Equation
H2O
H2O
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What Occurs if we mix a solution of◦ Sodium Chloride
AND◦ Silver Nitrate
What do we observe?◦ The white substance means that a ionic solid has
formed that is not dissolved in the water◦ What is the formula of this solid?
What are the two possibilities?
(NaCl)
(AgNO3)
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Molecular Equation: NaCl(aq) + AgNO3(aq) AgCl(s) + NaNO3(aq)
Ionic Equation: Na+
(aq) + Cl-(aq) + Ag+(aq) + NO3
-(aq) → AgCl(s) + Na+
(aq) + NO3-(aq)
◦ What ions exist on both sides of the equation?
◦ These can be cancelled out (Known as spectator ions)
Net Ionic Equation: Cl-(aq) + Ag+
(aq) → AgCl(s)Note: Remember your charges need to be balanced on both sides of the equation!
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Why would this solid not dissolve in the water when the ions before were dissolved?
The force of attraction between the two ions (Ag+ & Cl- ions) are stronger than the force of attraction between the ions and the polar water molecule
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http://www.crescent.edu.sg/crezlab/webpages/pptreaction4.htm