A Separation Technique Using Ore Halite
Introduction
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Ore halite is a natural source of sodium chloride. Separating the
maximum dry mass of pure sodium chloride is the purpose of this
investigation. It is assumed that the ore is 78% sodium and that the
residue is insoluble in water.
Prediction
Calculation based:
5.1g of rock salt - 78% of 5.1g is Nacl
78/100 * 5.1g= Xg Nacl, Xg being the predicted value.
Main body
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Apparatus
200m beaker, Bunsen burner, bench mat, evaporation basin, 40ml
distilled water, weigh boat, mortar and pestle, tripod, stirring rod,
funnel and filter paper.
Safety
Lab coats and protective glasses were used. Although sodium chloride
is a chemical compound it is non-hazardous if used in the correct
manner, it is also known as a common salt, table salt or halite.
Sodium chloride is the salt most responsible for the salinity of the
ocean amongst other things, widely used by humans, consumed in large
amounts over a period of time can have serious consequences to health.
The real hazards within this experiment were the hot water, bunsen
burner and the spitting out of the solution as it was heated.
Method
After being supplied with a sample of the ore halite a separation
technique had to be applied to separate the maximum dry mass of the
relatively pure sodium chloride. The ore was weighed out between 5.10g
and 5.20g. In this experiment 5.16g was used and measured in an
evaporation basin weighing at approx 43.78g before it was heated with
a Bunsen. Within this experiment white chloride as liquid evaporated
after 40ml of distilled water was introduced and heated for 4 minutes.
The main safety concerns within this experiment were really the
concerns with dealing with hot objects, otherwise everything else ran
smoothly.
Results
Before heating: boat
weighed 0.76g
Evaporation basin = 43.78g basin and ore
5.91g
After heating:
Evaporation basin = 52.79g 5.16g of the ore was used
Discussion of results
The difference after the experiment was carried out was that the
measurements with the Nacl had increased, infact it was 9.01g heavier
which means:
5.16g - 78% of 5.16g is Nacl
78 / 100 * 5.16 = 4.0248 Nacl 52.79 - 43.79 =
9.01g which was higher
78% was set as a perimeter, which was not accurate as there was too
much of the end product; the balance was not accurate as there was not
enough water evaporated. There was a degree of instrument error, which
should have been taken into account. The results should have been
carried out as follows:
Balance = 0.005 / mass of Nacl using the smallest reading * 100 = %
error from balance.
Balance = 0.005 / 5.16 * 100 = 0.097%
Conclusions
To carry out this experiment again the sample of ore should have been
carefully weighed, dissolved in water and then the insoluble should
have been filtered out. The sample then should have been evaporated
and then dried. The material left would have been mostly sodium
chloride. Which then would have been weighed
again.
Separating other ions forming soluble sodium or chloride salts would
be more complex, likely beyond the scope of this experiment.
The biological importance of sodium chloride is that it is essential
to life on earth. Most biological tissues and body fluids contain a
varying amount of salt. The concentration of sodium ions in the blood
is directly related to the regulation of safe body fluid levels.
Propagation of nerve impulses by signal transduction is regulated by
sodium ions. 0.9% sodium chloride in water is called a physiological
solution because it is isoosmotic with blood plasma. It is known
medically as normal saline. Physiological solution in the mainstay of
fluid replacement therapy is that it is widely used in medicine in the
prevention or treatment of dehydration.
Humans are unusual amont primates in secreting large amounts of salt
by sweating. Today salt is produced by the evaporation of seawater or
brine from other sources. People are familiar with the many uses of
salt in cooking but they might be unaware that salt is also used for
setting dyes in textiles and fabric, to producing soaps and
detergents. While salt was a scarce commodity in history,
industrialised production has now made salt plentiful (de-icing of
roads and cars in winter). This works because salt water has a lower
freezing point than pure water.
Chlorine on the other hand by itself is much more potent, it is a
highly toxic greenish yellow gas, has a pungent odder and fumes in
moist air. Chlorine is a highly reactive element, and under goes
reaction with a wide range or other elements and compounds. Chlorine
is a good bleaching agent, due to its oxidising properties. Chlorine
is soluble in water (which solution is called chlorine water) and this
loses its yellow colour on standing in sunlight, due to the formation
of a mixture of hypochlorous acid and hydrochloric acid.
A mixture of chlorine and hydrogen explodes when exposed to sunlight
to give hydrogen chloride. In the dark no reaction occurs, so
activation of the reaction by light energy is required. Chlorine is
used for the manufacture of bleaching powders and liquids:
· To bleach fabrics, wood, pulp and paper
· For the extraction of gold from its ores
· As a disinfectant to kill bacteria in the prep of drinking water
· Chlorine is also important in the manufacture of paints, aerosols
propellants and plastics.
Sodium metal is used in the preparation of tetraethyl lead and is used
in the manufacture of sodamide, sodium cyanide. Sodium compounds
including 'common salt'. The metal in metallic sodium may be used to
improve the structure of certain alloys to descale metal and to purify
molten metals. An alloy of sodium with potassium is also an important
heat transfer agent.
Rock salt excavated from salt mines is carefully washed and then crushed . To make table salt of specific granulate the duly crushed rock salt is passed through different sieves .
For example commonly used table salt is of 25-30 meshes granules.
Himalayan rock salt is considered to be purest and most healthful edible salt on this planet. Naturally enriched with 84 traced minerals responsible for human body growth and immune system. this nature's special mineral is being used in different shapes across the planet.
Take a very small cup. Put in salt, and mix it until it dissolves. Then put it in the sun, until all the water evaporates. If it is not sunny where you live, put it under a source of heat.
The streak of salt (halite) is white
It comes from halite which is like a natural salt. Graphite, on the other hand, is the mineral used in pencils
salt
Halite is NaCl which is the same thing as table salt
Halite is common salt, sodium chloride (NaCl). Gypsum is calcium sulfate (CaSO4·2H2O).
Halite, or salt.
Cow licks may be made of Halite, so, yes, in a way, salt can be made of Halite.
Halite is a type of mineral or salt.
Halite is a mineral but also it is salt. So it tastes like salt, or salty
Halite is found near Salt Lake City, Utah and Searles Lake in California.
Halite is rock salt. It tastes salty.
A salt
Halite is sodium chloride (rock salt, table salt).
The streak of salt (halite) is white
The mineral halite is more commonly known as table salt.
Halite is a type of mineral (rock). Often is used for road salt.
Halite or rock salt is roughly five centimeters tall