Question

Does milk of magnesia show a tyndall effect?

Answer 1

Hint : Milk of magnesia or Magnesium hydroxide or Magnesium dihydroxide has the chemical formula as $Mg{(OH)_2}$ . With molar mass $58.31$ g/mol. It appears as a white solid with hexagonal crystal structure. Milk of magnesia is produced industrially but a very small amount is mined . Milk of magnesia is very essential for making automobiles because of good conductivity strength.

Complete Step By Step Answer:
Milk of magnesia is known by different names like Magnesium hydroxide, Magnesium hydroxide. The formula of Milk of magnesia is $Mg{(OH)_2}$ . Milk of magnesia is prepared with the help of hydroxide ion to magnesium and another method is via addition of water to magnesium oxide. The preparation is as follows: -
$M{g^{2 + }} + 2O{H^ - } \to Mg{(OH)_2}$
$MgO + {H_2}O \to Mg{(OH)_2}$
Colloids are the very fine particles of size in nanometers. Nanometer is one ninth of the meter. Meter is the measuring unit of length. The size range of the colloidal is $1 - 100$ nanometer.
Tyndall effect is the scattering of the beam of light by the colloidal particles of the range of nanometers.
Off the beam of light is passed through the Milk of magnesia, then the tyndall effect is observed as the particles of milk of magnesia acts as a barrier to the beam. This barrier is due to the particle size which restricts the flow of light in a straight line. Thus the tyndall effect is observed.

Note :
For the tyndall effect to take place the particle size of the medium should be big enough so that the beam is not passed in a straight line. However there is some zig-zag movement of the light. For tyndall effect the beam should be passed, thus particles with very large size will not allow the beam to pass thus leading to refraction of the beam.