double replacement reactions
Download
Skip this Video
Download Presentation
Double Replacement Reactions

Loading in 2 Seconds...

play fullscreen
1 / 18

Double Replacement Reactions - PowerPoint PPT Presentation


  • 79 Views
  • Uploaded on

Double Replacement Reactions. DR rxns occur in aqueous solutions. What happens when substances dissolve in water?. depends if substance is ionic or covalent. Dissolving. c ovalent substances (such as sugar can dissolve but molecules stay intact in solution)

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Double Replacement Reactions' - vinaya


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
dr rxns occur in aqueous solutions
DR rxns occur in aqueous solutions
  • What happens when substances dissolve in water?
  • depends if substance is ionic or covalent
dissolving
Dissolving
  • covalent substances (such as sugar can dissolve but molecules stay intact in solution)
  • C6H12O6(s)  C6H12O6(aq)
  • covalent substances:

moleculesspread out in solution

dissolving1
Dissolving
  • Ionic substances ionize (dissociate) when dissolve; molecules do not remain intact
  • NaCl(s)  Na+1(aq) + Cl-1(aq)
  • Ionic substances:

ions spread out in solution

double replacement reactions1
Double Replacement Reactions
  • occur when mix 2 ionic compounds together in an aqueous soln
  • 3 possible products:

- liquid (H2O)

- gas

- solid

reactions that form liquid water
Reactions that form liquid water

HBr(aq) + NaOH(aq)  H2O(l) + NaBr(aq)

aqueous refers to something dissolved in water so when water is a product it is labeled as liquid NOT aqueous

reactions that form gases

H2O(l) + CO2(g)

Reactions that form Gases

HCl(aq) + NaHCO3(aq) 

H2CO3(aq) + NaCl(aq)

HCl(aq) + NaHCO3(aq)  H2O(l) + CO2(g) + NaCl(aq)

reactions producing solids
Reactions producing Solids

2 NaOH(aq) + CuCl2(aq) 

2 NaCl(aq) + Cu(OH)2(s)

slide9

Reactions producing Solids

Precipitation reactions:

  • occur when an insoluble solid is formed as a result of chemical reaction

solid precipitate forms - opposite of dissolving!

slide10

So how do you know if a product of a DR reaction is aqueous or a solid, liquid or gas?

Table F is used to determine if a product is soluble or not

If soluble: (aq)

If not soluble: (s)

slide11

Complete Ionic Equations

and

Net Ionic Equations

slide12

Complete Ionic Equations

show all ions involved in a chemical reaction taking place in aqueous solution

ex complete ionic equation
Ex: Complete Ionic Equation

NaOH(aq) + CuCl2(aq) 

2 NaCl(aq) + Cu(OH)2(s)

Na+1(aq) + 2OH-1(aq) + Cu2+(aq) + 2Cl-1(aq)

2Na+1(aq) + 2Cl-1(aq) + Cu(OH)2(s)

net ionic equations show only the i ons that form a non aqueous product in a dr chemical reaction
Net Ionic Equationsshow only the ions that form a non-aqueous product in a DR chemical reaction
solid as product

Net ionic equation:

2OH-1(aq) + Cu2+(aq)  Cu(OH)2(s)

Solid as product

Complete ionic equation:

2Na+1(aq) + 2OH-1(aq) + Cu2+(aq) + 2Cl-1(aq)

2Na+1(aq) + 2Cl-1(aq) + Cu(OH)2(s)

  • Notice some ions do not participate in reaction
    • known as spectator ions
    • cross out spectator ions to get net ionic equation
water as product

Net ionic equation:

H+1(aq) + OH-1(aq)  H2O(l)

Water as product

HBr(aq) + NaOH(aq)  H2O(l) + NaBr(aq)

Complete ionic equation:

H+1(aq) + Br-1(aq) + Na+1(aq) + OH-1(aq) 

H2O(l) + Na+1(aq) + Br-1(aq)

gases as product

Net ionic equation:

H+1(aq) + HCO3-1(aq)  H2O(l) + CO2(g)

Gases as product

HCl(aq) + NaHCO3(aq) 

H2O(l) + CO2(g) + NaCl(aq)

Complete ionic equation:

H+1(aq) + Cl-1(aq) + Na+1(aq) + HCO3-1(aq) 

H2O(l) + CO2(g) + Na+1(aq) + Cl-1(aq)

conservation of charge
Conservation of Charge

total charge (reactant side)

must =

total charge on product side

ad