1. Aim: How to write neutralization reactions

2. Reactions of Acids with metals According to Table J, any METAL LOCATED ABOVE H 2 WILL REACT WITH AN ACID to produce H 2 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 + H 2 (g) Ex: Zn (s) + 2HCl (aq)  _______ + ______ ZnCl 2 (aq) H 2 (g)

4. Reactions of Acids with metals Ca + 2HCl  CaCl 2 + H 2 Metal Produces H 2 Above H2H2 This is a SINGLE REPLACEMENT reaction; notice how H 2 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) + H 2 O(g) → _____(s) + _____ (g)

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 + H 2 O Acid Base Salt water Acid neutralizes base or base neutralizes acid It is a double replacement reaction.

9. Strong Acids Strong Bases HCl HI LiOHRbOH HBr H 2 SO 4 NaOH Ba(OH) 2 HNO 3 HClO 4 KOH CsOH Sr(OH) 2 Ca(OH) 2 Do we always get a completely neutral solution? Combination Product (Acidic/Basic/Neutral)Endpoint pH ( 7) Strong acid + Strong Base Strong acid + Weak Base Weak acid + Strong Base

10. Question Complete the following reactions. Make sure they are balanced! 1. HBr + KOH  __________ + __________ 2. NaOH + HC 2 H 3 O 2  __________ + __________ 3. KOH + H 3 PO 4  __________ + __________ 4. 2HNO 3 + Ca(OH) 2  __________ + __________