1. Aim: How to write neutralization reactions

2. Reactions of Acids with metals
According to Table J, any METAL LOCATED ABOVE H2 WILL REACT WITH AN ACID to produce H2 gas and a salt
Example: Which metal, Mg or Cu will react with HCl? ________

3. Reactions of Acids with metals
General Rxn: Metal + Acid  Salt + H2(g)
Ex: Zn (s) + 2HCl (aq)  _______ + ______
H2(g)
ZnCl2(aq)

4. Reactions of Acids with metals
Ca + 2HCl  CaCl H2
Metal Produces H2
Above H2
This is a SINGLE REPLACEMENT reaction; notice how H2 GAS is produced!

5. Reactions of metals with water
GROUP I METALS: All Group I metals react vigorously with “cold” water
the Group II Metals become more reactive with water as you go DOWN the group
Mg(s) + 2H2O(g) → _____(s) + _____ (g)
Mg(OH) H2

7. Neutralization reactions
Neutralization occurs:
# of H+ ions = # of OH- ions (equivalent or equal amounts)
when an Arrhenius acid and an Arrhenius base react to form WATER and a SALT
Example: Antacid for upset stomach neutralizes the acid in stomach and makes a neutral salt to provide relief

8. Neutralization reactions
HCl + NaOH  NaCl + H2O
Acid Base Salt water
Acid neutralizes base or base neutralizes acid
It is a double replacement reaction.

9. Do we always get a completely neutral solution?
Strong Acids Strong Bases
HCl HI LiOH RbOH
HBr H2SO4 NaOH Ba(OH)2
HNO3 HClO4 KOH CsOH
Sr(OH)2
Ca(OH)2
Do we always get a completely neutral solution?
Combination Product
(Acidic/Basic/Neutral)
Endpoint pH
(<7, 7, >7)
Strong acid + Strong Base
Strong acid + Weak Base
Weak acid + Strong Base
Neutral 7
Acidic
<7
Basic
>7

10. Questions HBr + KOH  3. 3KOH + H3PO4  NaOH + HC2H3O2 
Complete the following reactions. Make sure they are balanced!
HBr + KOH 
NaOH + HC2H3O2 
3. 3KOH + H3PO4 
4. 2HNO3 + Ca(OH)2 

11. 1. HBr + KOH  _KBr_____ + __H2O_____
Answers
Complete the following reactions. Make sure they are balanced!
1. HBr + KOH  _KBr_____ + __H2O_____
2. NaOH + HC2H3O2  _NaC2H3O2_ + ___H2O___
3. 3KOH + H3PO4  _K3PO4____ + _3H2O______
4. 2HNO3 + Ca(OH)2  __Ca(NO3) 2___ + ___2H2O_