The most effective ionic substance that coagulates the positively charged sol Aluminium hydroxide has to be identified from the following – (a) N a C l (b) C a C l 2 (c) F e 2 ( S O 4 ) 3 (d) K 3 P O 4 Concept Introduction: Based on the particle size of the components, solutions can be of three types – true solutions, colloidal solutions and suspension. Colloidal solutions have the particle size of the range 1 - 1 0 0 0 n m . A colloidal solution is made of dispersed phase and dispersion medium which corresponds to solute and solvent respectively. Depending upon the physical state of dispersed phase and dispersion medium, there are various types of colloids such as gel, foam, alloy, sol etc.

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10. Stereochemistry. Assign R/S stereochemistry for the chiral center indicated on the following compound. In order to recieve full credit, you MUST SHOW YOUR WORK! H₂N CI OH CI カー 11. () Stereochemistry. Draw all possible stereoisomers of the following compound. Assign R/S configurations for all stereoisomers and indicate the relationship between each as enantiomer, diastereomer, or meso. NH2 H HNH, -18

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Chapter 12, Problem 12.86QP

Interpretation Introduction

Interpretation:

The most effective ionic substance that coagulates the positively charged sol Aluminium hydroxide has to be identified from the following –

(a) NaCl (b) CaCl2 (c) Fe2(SO4)3 (d) K3PO4

Concept Introduction:

Based on the particle size of the components, solutions can be of three types – true solutions, colloidal solutions and suspension. Colloidal solutions have the particle size of the range 1 - 1000 nm. A colloidal solution is made of dispersed phase and dispersion medium which corresponds to solute and solvent respectively. Depending upon the physical state of dispersed phase and dispersion medium, there are various types of colloids such as gel, foam, alloy, sol etc.

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