Predicting Products
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Transcript of Predicting Products
Predicting Products
Single DisplacementUse activity series of metals• If metal C is more active than A, then it
replaces less active metal A. AB + C CB + A
• If metal F is less reactive than metal D, it cannot bump off D & reaction does not occur
DE + F no reaction
Activity Series p 148 • General Trends of metal activity (how well
they can displace):– Lighter metals bump off heavier metals– Metals with +1 charges will bump metals with
+2 charges– How to read table 4-12: the higher up a metal,
the more active it is.– Not perfect trends:
• Ca2+ displaces Na+
NaCl + F2 --->NaF + Cl2
NaF + Cl2 --->No reaction
MgCl2 + Na KBr + Cl2 FeCl3 + Cu
Na2SO4 + Cu
Double Displacement or Metathesis
•Use solubility tables p134 – 135
•For rxn to occur, precipitate (ppt) must form
BaCl2(aq)+ K2SO4(aq)
----->BaSO4(s)+ KCl(aq)
3 ways to write reactions (when they’re in aqueous solutions): (p136)
• Formula unit equations
2 AgNO3 (aq) + Cu (s) 2 Ag (s) + Cu(NO3) (aq)
• Total Ionic equations
2 [Ag+(aq) + NO3- (aq)] + Cu(s)
2 Ag (s) + [Cu+(aq) + 2NO3-
(aq)
• Net Ionic equations
2 Ag+ (aq) + Cu (s) 2 Ag (s) + Cu2+ (aq)
NaCl(aq) + KBr(aq)
-----> NaBr(aq) + KCl(aq)
How is this reaction written? Rewrite as total ionic.
Can you rewrite as net ionic?No! Only spectator ions!
• Na+ (aq) + Cl- (aq) + K+ (aq) + Br- (aq)----->
Na+ (aq) Br- (aq) + K+ (aq) + Cl- (aq)
DD or Metathesis•Acid-base:
•When an acid is combined with a base, the products will be salt & water
HCl(aq) + NaOH(aq)
----->NaCl(aq) + H2O(l)
Mg(OH)2(aq) + H2SO4(aq)
MgSO4(aq) + H2O(l)
Ba(OH)2(aq) + CaCl2(aq)
ZnCl2(aq) + K2CrO4(aq)
KCl(aq) + Na2SO4(aq)
HCl(aq) + NaOH(aq)
H2SO4(aq) + KOH(aq)
HCl(aq) + NH3(aq)
Combustion•Carbon compound
+ oxygen yields Carbon dioxide &
water
C3H6(g) + O2(g)
C4H8O(l) + O2(g)
C4H8O4(g) + O2(g)
Predict Products & Balance Rxn
•CaCl2 + F2 •CaCl2 + Na •CaCl2 + KNO3 •CaCl2 + K2SO4
Predict & Balance•AlBr3 + F2 •AlBr3 + Zn •AlBr3 + Na •AlBr3 + Ba(NO3)2 •AlBr3 + K2SO4
Calculate the mass of solid product formed
when 4.16 g of barium chloride is added to 250 ml of 0.40 M potassium sulfate: