How does salinity affect colloidal stability? • Increasing ionic strength → charge screening (EDL compression) →...

How does salinity affect colloidal stability? • Increasing ionic strength → charge screening (EDL compression) → reduced stability

Expert Solution

Salts are highly stable components containing positive and negative charged components held together by Columbic force of attraction.When salts are added to a colloidal system, it causes decrease in double layer, thereby causing instability resulting into coagulation. Greater the ionic strength greater will be the number of oppositely charged ions which are held together by coulombs forces thereby screening the EL within. Off the double layer present,the diffused part compresses and ion absorption occurs due to this. Now as a result of this, Vanderwaals forces dominate( magnitude of force of repulsion also increases) and hence coagulation occurs resulting in decreased stability.

queen_honey_blossom answered 2 years ago

Calculate the ionic strength of (a) a coastal seawater of salinity 17.5 (i.e., one-half of typical...

Calculate the ionic strength of (a) a coastal seawater of salinity 17.5 (i.e., one-half of typical open ocean salinity) in mol kg-1 and (b) 0.7 mol/l NaCl and (c) another solution of 0.1 mol/l MgCl2

How does unemployment affect economic stability?

How does the aggregate strength affect normal concrete strength?

How does increasing the temperature of a liquid affect the rate of vaporization? Increasing the temperature...

How does increasing the temperature of a liquid affect the rate of vaporization? Increasing the temperature has no effect on the rate of vaporization. The rate of vaporization decreases. The rate of vaporization increases. How does increasing the surface area of a liquid affect the rate of vaporization? The rate of vaporization increases. The rate of vaporization decreases. Increasing the surface area of a liquid has no effect on the rate of vaporization. How does the rate of vaporization for...

Explain why: Ionic strength increase then activity coefficient decrease Ionic charge increase then activity coefficient increase...

Explain why: Ionic strength increase then activity coefficient decrease Ionic charge increase then activity coefficient increase Ionic size increase then activity coefficient decrease

Explain why (Simple explanation) Ionic strength increase then activity coefficient decrease Ionic charge increase then activity...

Explain why (Simple explanation) Ionic strength increase then activity coefficient decrease Ionic charge increase then activity coefficient increase Ionic size increase then activity coefficient decrease

a. Order the following chemical bonds in order of increasing strength. (Hydrogen Bond, Covalent Bond, Ionic...

a. Order the following chemical bonds in order of increasing strength. (Hydrogen Bond, Covalent Bond, Ionic Bond, van der Waals interaction) b. What is the pH of a 0.1 mM solution of NaOH? c. What type of bonds exist in a water molecule? (Polar Covalent, Hydrogen, Non-Polar Covalent, van der Waals, Ionic bonds)

1) How does increasing the degree of unsaturation affect the rate of the Sn1 and the...

1) How does increasing the degree of unsaturation affect the rate of the Sn1 and the Sn2 reaction? 2) How does shifting from a cycloalkyl bromide to an aromatic bromide affect the rate of the Sn1 and the Sn2 reaction?

How Does the Ratio of Sand to Cement Affect the Strength of Concrete? Explain in details

How does an increase or decrease in pH affect the composition and charge of a functional...

How does an increase or decrease in pH affect the composition and charge of a functional group(s)? What is the orientation of a water molecule around a negatively charged ion? Positively charged ion? Would nonpolar side chains make an amino acid hydrophilic or hydrophobic? What about polar side chains?

Question