Purification of Colloids
Chemistry ⇒ Solutions and Colloids
Purification of Colloids starts at 11 and continues till grade 12.
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Describe how ultracentrifugation can be used to purify colloidal solutions.
Describe the effect of adding a small amount of electrolyte to a colloidal solution before purification.
Describe the effect of temperature on the rate of dialysis.
Describe the main difference between dialysis and ultrafiltration in the purification of colloids.
Describe the role of a semipermeable membrane in the purification of colloids.
Explain the principle of ultrafiltration in the purification of colloids.
Explain why colloidal solutions are not stable in the presence of high concentrations of electrolytes.
Explain why colloidal solutions need to be purified before use in industries or medicine.
Explain why electrodialysis is faster than ordinary dialysis.
Explain why the presence of electrolytes in excess can destabilize a colloidal solution.
Explain why the use of a semipermeable membrane is essential in dialysis.
Explain why the use of distilled water is preferred during the purification of colloids.
Name the membrane commonly used in dialysis for the purification of colloids.
Name two methods by which the rate of dialysis can be increased.
State one reason why ordinary filtration cannot be used to purify colloidal solutions.
