General Chemistry - Reaction Types
3 important questions on General Chemistry - Reaction Types
Souble displacement reactions
Also called metathesis reactions, elements from 2 compounds displace each other to form two new compounds
Rules to assign oxidation #s
- Free element, ox. # always = 0
- monatomic ions, ox # = chage of ion
- Group IA = 1+, Group IIA = 2+
- Group VIIA = 1-, unless combined w/ a more electronegative element
- H+ = 1+, uness placed w/ a less electronegative element such as a IA or IIA
- O = 2-, except in OF2 and H2O2
- Sum of Ox. #s of each atom must equal the charge of the compound
- F always = -1, is the most electronegative element
- Metallic elements always have + ox. #s
Balancing Redox rxns: in basic solution
- Separate rxn into 2 half reactions
- Balance the Balance the #O by adding H2O, balance #H by adding H+
- Balance the # e-s
- Combine the 2 half reactions, Add OH- to cancel out the H+ added in step 2, forming water. Cancel out species appearing on both sides
- Confirm mass and charge are balanced
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