8. Judy used the following soil triangle to identify a sample of soil as silty clay.
100
e
90
80
Percent
Clay
9 so
70
Percent
Silt
clay
40
60
Clay
Silt (%)
50
silty
clay
40
clay
clay loam
30
silty
clay loam
sandy day loam
20
loam
silt loani
10
sandy loam
Joamy
sand sand
silt
Sand (%)
Percent
Sand

Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.