Purification of Colloids
Chemistry ⇒ Solutions and Colloids
Purification of Colloids starts at 11 and continues till grade 12.
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A colloidal solution is purified by dialysis. After some time, the conductivity of the external water increases. What does this indicate?
A colloidal solution is purified by ultrafiltration. What would you expect to find in the filtrate?
A colloidal solution of starch contains sodium chloride as an impurity. Which purification method would you use and why?
Describe how you would purify a colloidal solution containing both ionic and non-ionic impurities.
Describe the process of electrodialysis and its advantage over simple dialysis.
A colloidal solution is purified by dialysis. After some time, the conductivity of the external water increases. What does this indicate?
A colloidal solution is purified by ultrafiltration. What would you expect to find in the filtrate?
A colloidal solution of starch contains sodium chloride as an impurity. Which purification method would you use and why?
Which method is most suitable for removing both dissolved and undissolved impurities from a colloidal solution?
(1) Dialysis
(2) Ultrafiltration
(3) Precipitation
(4) Sedimentation
Which method of colloid purification is best suited for heat-sensitive colloidal solutions?
(1) Boiling
(2) Dialysis
(3) Centrifugation
(4) Precipitation
Which of the following is a disadvantage of ultrafiltration?
(1) It is very slow
(2) It requires special membranes
(3) It cannot remove electrolytes
(4) It is not suitable for heat-sensitive colloids
Which of the following is a limitation of dialysis?
(1) It is a slow process
(2) It cannot remove non-electrolyte impurities
(3) It requires a semi-permeable membrane
(4) All of the above
Dialysis is a process used to separate _______ from colloidal solutions.
During dialysis, the colloidal solution is placed inside a _______ membrane.
Fill in the blank: The process of removing dissolved impurities from a colloidal solution by passing it through a semi-permeable membrane is called _______.
Fill in the blank: The process of removing impurities from a colloidal solution by passing it through a membrane under pressure is called _______.
True or False: Dialysis can be used to separate colloidal particles from large suspended particles.
True or False: Dialysis can be used to separate two different colloidal solutions mixed together.
True or False: Electrodialysis is faster than ordinary dialysis.
True or False: The main purpose of purification of colloids is to remove the dispersed phase.
