Midterm Exam Questions

H & Al ions that contribute to residual acidity are strongly bonded to the soil particles. There are numerous ways how this strong bonding (much stronger than electrostatic attraction) occurs, but the only one that has been mentioned in this course is bonding in the inetrlayer space of the phyllosilicates. Hence, for those strongly bonded H & AL ions to be exchanged, phyllosilicate will need to weather 1st and then these ions could be exchanged.