podcast 7.5 molecular, complete ionic, and net ionic equations
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Podcast 7.5 Molecular, Complete Ionic, and Net Ionic Equations. Forming Ions. Ionic (i.e. ________) refers to positive ion and negative ion Usually this is a metal + non-metal or metal + polyatomic ion Examples: NaCl , NaClO 3 , Li 2 CO 3 - PowerPoint PPT PresentationTRANSCRIPT
Podcast 7.5Molecular,
Complete Ionic, and Net Ionic Equations
Forming Ions
• Ionic (i.e. ________) refers to positive ion and negative ion
• Usually this is a metal + non-metal or metal + polyatomic ion
– Examples: NaCl, NaClO3, Li2CO3
• Polyatomic ions are listed on your naming card
What it Means to be “Dissolved,” (aq)
• (aq) means ___________ (dissolved in water)• For salts (aq) means the salt exists as _____• NaCl(aq) is the same as: Na+(aq) + Cl–(aq)• Acids form ions: HCl(aq) is H+(aq) + Cl–(aq),
Bases form ions: NaOH(aq) is Na+ + OH–
http://www.northland.cc.mn.us/biology/biology1111/animations/dissolve.html
The Solubility RulesNa-Cl-NO-SO-OH
Na Cl NO3 SO4 OH
Circle all the ionic compounds that are INSOLUBLE (these are the precipitates)
MgF2 CuSO4 NH4Cl Fe(OH)3 CsF
AgCl CdS CuF2 PbSO4 Ba(OH)2
Na2SO4 NH4OH Sr(NO3)2 Hg2I2 Na2CrO4
BaCO3 PbBr2 CaC2O4 HC2H3O2 MgO
Practice with writing ions
Q - Write ions for Na2CO3(aq)
A - 2Na+(aq) + CO32–(aq)
Notice that when ions form from molecules, charge can be separated, but the total charge (and number of each atom) stays constant.
Practice Writing Ions Example 1 Write ions for Ca3(PO4)2(aq) & Cd(NO3)2(aq)
Practice Writing Ions Example 2
Write ions for Na2S(aq) and Mg3(BO3)2(aq)
Types of chemical equationsEquations can be divided into 3 types
1) Molecular, 2) Complete Ionic, 3) Net ionic• Here is a typical molecular equation:Cd(NO3)2(aq) + Na2S(aq) CdS(s) + 2NaNO3(aq)
Complete Ionic Equation
Cd(NO3)2(aq) + Na2S(aq) CdS(s) + 2NaNO3(aq)
•We can write this as complete ionic equation – all compounds that are (aq) are written as ions
Net Ionic Equation
• To get the NET ionic equation we cancel out all terms that appear on both sides:
Cd2+(aq) + 2NO3–(aq) + 2Na+(aq) + S2–(aq)
CdS(s) + 2Na+(aq) + 2NO3
–(aq)
Equations must be balancedMaterials balance
Both sides of an equation should have the same number of each type of atom
Electrical balanceBoth sides of a reaction should have the same net charge
Example 3 When NaOH(aq) and MgCl2(aq) are mixed,
_______(s) and NaCl(aq) are produced.
Write balanced molecular, ionic & net ionic equations
Example 4Write the balanced net ionic equation
CuSO4(aq) + BaCl2(aq) CuCl2(aq) + BaSO4(s)
Example 5 Write the balanced net ionic equation
Fe(NO3)3(aq) + LiOH(aq) _____(aq) + Fe(OH)3(s)
Example 6Write the balanced net ionic equation
Na3PO4( ) + CaCl2( ) _____( ) + NaCl( )
Example 7Write the balanced net ionic equation
Na2S( ) + AgC2H3O2( ) ____( ) + Ag2S( )
Use the solubility rules to predict the products and write the net ionic
equation for the following reactions.Al (s) + H2SO4 (aq) →
Use the solubility rules to predict the products and write the net ionic
equation for the following reactions.HCl (aq) + Ba(OH)2 (aq) →