Which of the following factors can promote the coagulation of a colloidal solution?
Increase in temperature
Increase in pH
Decrease in electrolyte concentration
Presence of a stabilizing agent
An increase in temperature can promote the coagulation of a colloidal solution by increasing the kinetic energy of the particles, leading to more frequent collisions and aggregation. On the other hand, a decrease in temperature can decrease the kinetic energy, resulting in less frequent collisions and stability of the colloid. Increase in pH or the presence of a stabilizing agent can also enhance the stability of a colloid and prevent coagulation. The presence of electrolytes, however, can cause coagulation by neutralizing the charges on the surface of the colloidal particles.