1. 4.4 Single Displacement Reaction

2. Involves one element replacing or displacing a second element in a compound
A BC AC B
typical in metallurgical processes

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Get some of our benefits from each metal and minimize
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4. Watch out zinc… that chlorine is mine!
A metal element will only displace a metal in a compound.
Na (s) + ZnCl2 (aq) 
Balanced?
2 Na (s) + ZnCl2 (aq)  2 NaCl (aq) + Zn (s)
Watch out zinc… that chlorine is mine!
NaCl (aq) + Zn (s)

5. A non-metal will only displace a non-metal in a compound
NaCl (aq) + F2(g) 
2NaCl (aq) + F2 (g)  2NaF(aq) + Cl2 (g)
My electronegativity is far superior to yours chlorine…that sodium in MINE!
NaF (aq) + Cl2 (g)

6. Examples! CuCl2 (aq) + Al  AlCl3 (aq) + Cu (s)
Br2 + CaI2 (aq)  I2 (l) + CaBr2 (aq)

7. Activity Series
The Activity Series of the metals is an aid to predicting the products of replacement reactions. Each element on the list replaces from a compound any of the elements below it. The larger the interval between elements, the more vigorous the reaction.

8. Metals
Halogen

10. Going from bottom to top, the metals:
- level of reactivity increases
- lose electrons more readily
- form positive ions more readily
- becomes stronger reducing agents

11. A metal 'high up' in the reactivity series:
-reacts vigorously and quickly with chemicals
-corrodes easily
A metal 'low down' in the reactivity series:
- doesn't react vigorously and quickly with chemicals
- doesn’t corrode easily

12. Use the activity series to predict whether zinc reacts with magnesium nitrate and, if so, the products of this reaction. Represent the reaction in a balanced chemical equation.
Zinc + Magnesium nitrate → NR
Zn (s) + Mg(NO3)2 (aq) → NR

13. Cl2 (g) + 2 NaBr (aq) → 2 NaCl (aq) + Br2 (g)
2. Predict the products of the reaction (if any) between chlorine gas and a solution of sodium bromide obtained from seawater (brine). Represent the reaction in a balanced equation.
Chlorine gas + aqueous sodium bromide → aqueous sodium chloride + bromine gas
Cl2 (g) + 2 NaBr (aq) → 2 NaCl (aq) + Br2 (g)