Rules for Redox

Rules for Redox

Redox Rules

• A charged monatomic- the oxidation number is the charge

• an uncharged element- has a 0 charge (diatomic or monatomic)

• Polyatomics are their charge if unbroken if broken must be calculated

Cont

• Oxygen is -2 (not diatomic)

• Hydrogen +1

Fill in the Blank

 $Mg+2HCl\rightarrow MgCl2+H2$ 
Mg in the reactants Oxidation number

Fill in the Blank

 $Mg+2HCl\rightarrow MgCl2+H2$ 
What is the Oxidation number for Hydrogen in the product?

Multiple Choice

 $Mg+2HCl\rightarrow MgCl2+H2$ 
Mg is being 

• oxidized

• reduced

• spectator ion

Multiple Choice

 $Mg+2HCl\rightarrow MgCl2+H2$ 
H is being 

• oxidized

• reduced

• spectator ion

Multiple Choice

 $Mg+2HCl\rightarrow MgCl2+H2$ 
Cl is being 

• oxidized

• reduced

• spectator ion

Multiple Choice

 $2K_2Cr_2O_7+2H_2O+3S\rightarrow3SO_2+4KOH+2Cr_2O_3$ 
K is 

• oxidized

• spectator

• reduced

Multiple Choice

 $2K_2Cr_2O_7+2H_2O+3S\rightarrow3SO_2+4KOH+2Cr_2O_3$ 
S is 

• oxidized

• spectator

• reduced

Multiple Choice

 $2K_2Cr_2O_7+2H_2O+3S\rightarrow3SO_2+4KOH+2Cr_2O_3$ 
Cr is 

• oxidized

• spectator

• reduced

Multiple Choice

 $2K_2Cr_2O_7+2H_2O+3S\rightarrow3SO_2+4KOH+2Cr_2O_3$ 
Cr is 

• oxidized

• spectator

• reduced

Multiple Choice

 $2K_2Cr_2O_7+2H_2O+3S\rightarrow3SO_2+4KOH+2Cr_2O_3$ 
Cr is 

• oxidized

• spectator

• reduced