Bentonite Magma and Milk of Magnesia Flashcards
prepared by precipitating the dispersed phase to achieve a fine degree of subdivision of the
particles and a gelatinous character to those particles
Magmas
Precipitate of microcrystalline particles develop due to?
strong attraction with water to yield gelatinous particles
strength of bentonite magma
5% in purified water
other name for bentonite magma
a native colloidal hydrated aluminum silicate
Use of bentonite magma
suspending agent or viscosity increasing agent
Prepared mechanically in a blender or it may be
prepared by sprinkling the bentonite, in portions,
upon hot purified water
Bentonite magma
How many times does bentonite swell up upon water addition?
12 times
Why is BM standing period 24 hours?
Ensure complete hydration and swelling of the bentonite
What forms when bentonite magma has been stand undisturbed?
it sets to gel and with agitation it forms a sol
4% bentonite magma is
thixotropic gel
When is suspending capacity of magma reduced?
pH is lowered to about 7
an opaque white viscous
preparation from which varying proportions of
water separate on standing
Milk of Magnesia
Composed of the fine, flocculent, gelatinous precipitate
of magnesium hydroxide
Milk of magnesia
prepared by reaction between sodium hydroxide and magnesium sulfate
Milk of magnesia
Dose of milk magnesia to neutralize 10 meq of stomach acid
5 mL
