This document discusses several important chemical compounds including common salt, sodium hydroxide, chlorine, hydrogen, baking soda, washing soda, and plaster of Paris. It describes their chemical formulas, methods of production, and key uses. For example, it explains that sodium hydroxide is produced through the chloralkali process of electrolyzing salt water to produce chlorine, hydrogen, and sodium hydroxide. Sodium hydroxide then has various industrial and domestic uses such as for making soap.
3. COMMON SALT (NaCl)
Sodium chloride is known as common salt. Its main
source is sea water. It also exists in the form of
rocks and is also called rock salt as its large crystals
are often brown due to impurities.
Common salt is an important component of our
food. It is also used for preparing sodium hydroxide,
baking soda, washing soda etc.
5. What is meant by Chlor Alkali process?
The chloralkali process (also chlor-alkali and chlor
alkali) is an industrial process for the electrolysis of
sodium chloride solutions.
It is the technology used to produce chlorine and
sodium hydroxide (lye/caustic soda), which are
commodity chemicals required by industry.
6. BRINE
Brine is a high-concentration solution of salt in
water.
Brine is used for food processing and cooking
(pickling and brining), for de-icing of roads and
other structures, and in a number of technological
processes.
7. SODIUM HYDROXIDE
Common name: Caustic Soda
Chemical name: Sodium Hydroxide
Chemical formula: NaOH
Nature: Basic
Colour: white
State: solid pellets
8. Preparation of Sodium
hydroxide (NaOH)
Sodium Hydroxide is Prepared by Chlor Alkali process.
When electricity is passed through an aqueous solution of
sodium chloride (brine), it decomposes to form sodium
hydroxide. This process is called chlor-alkali process.
Chlorine gas is formed at the anode, and hydrogen
gas at the cathode. The solution in the cathodic
compartment contain Sodium hydroxide . This
solution is taken out and is concentrated to get solid
solution.
2NaCl(aq) + 2 H2O (l) → 2NaOH(aq) + Cl2(g) + H2(g)
Sodium chloride Sodium hydroxide Chlorine gas
9.
10.
11. Properties Of Sodium Hydroxides
- Produce hydroxide ions [OH –] in H2O so it is basic in nature.
– It is a water soluble bases so it is called as alkalies.
– It has bitter taste
– It turn red litmus blue.
- It reacts with metals to form oxysalts and release hydrogen
gas
– It act as electrolyte as it produces ions in solution
– it reacts with acids to form salt and water and neutralize
solutions containing H+ ions.
– It has a slippery, ‘soapy’ feel.
– Dissolve fatty material
- It reacts with ammonium salts to release ammonia gas
12. Uses of NaOH
It is used for de-greasing metals
It is used to make soaps and detergents.
It is used for making paper and artificial fibres.
It is used as a base in laboratory.
13.
14. USES OF HYDROGEN GAS
It is used as a rocket fuel
It is used in welding and in fusion reactions of
sun.
It is used in reduction reactions of metallic ores
It is used in hydrogenation of vegetables oil and fats
to convert it into vanaspati ghee.
It is used as a clean fuel as it is highly inflammable
.It liberate high amount of energy and is non
polluting.
It is used in commercial fixation of nitrogen from the
air in the Haber ammonia process
15. It is used in methanol production, in
hydrodealkylation, hydrocracking, and
hydrodesulphurization
It is used in production of hydrochloric acid
It is used for filling balloons (hydrogen gas
much lighter than air; however it ignites
easily)
liquid H2 is important in cryogenics and in the
study of superconductivity since its melting
point is only just above absolute zero
16.
17.
18.
19. USES OF CHLORINE GAS
It is used as a disinfectant in drinking water as Chlorine kills
bacteria
It is used to treat drinking water and swimming pool water.
It is used to make -PVC ( poly vinyl chloride).
- bleaching powder.
- pesticides
- detergents for washing clothes
-chlorofluorocarbons
It is also used to make hundreds of consumer products from
paper to paints, and from textiles to insecticides.
Swimming pools need chlorine to keep the water clean and
safe to swim in.
20. Chlorine helps keep water clean by preventing the
growth of algae. It keeps your pool water safe by attacking
and neutralizing harmful bacteria and microorganisms
Chlorine gas is itself very poisonous, and was used as a
chemical weapon during the First World War.
Chlorine gas will react with the water in the mucous/linings
of your lungs and form hydrochloric acid. This will destroy
your lung's ability to take in oxygen and will be very painful.
Drugs produced with chlorine chemistry are used to treat
many medical conditions and diseases, including high
cholesterol, diabetes, cancer, stomach ulcers,
anemia, depression, asthma, high blood pressure,
inflammation and epilepsy.
21.
22.
23. What are side effects of chlorine?
Following chlorine exposure, the most common
symptoms are:
Airway irritation.
Wheezing.
Difficulty breathing.
Sore throat.
Cough.
Chest tightness.
Eye irritation.
Skin irritation.
26. BLEACHING POWDER
Common name: Bleaching powder
Chemical name: Calcium oxychloride
Chemical formula: CaOCl2
Nature: Oxidising nature
Appearance: Yellowish white powder having a smell of chlorine
Bleaching powder is represented as CaOCl2, though the
actual composition is quite complex.
Preparation: Bleaching powder is produced by the action of
chlorine on dry slaked lime at a temperature of 40-50 degree
celcius.
Ca(OH)2 + Cl2 → CaOCl2 + H2O
Slaked lime Bleaching powder
27. PROPERTIES OF BLEACHING POWDER
When bleaching powder comes in contact with water, it
releases Chlorine gas.
CaOCl2 +CO2 → CaCO3 + Cl2(g)
It also reacts with hydrochloric acid and sulphuric acid to
release Chlorine gas.
CaOCl2 +HCl → CaCl2+ H2O+ Cl2(g)
CaOCl2 +H2SO4 → CaSO4 + H2O+Cl2(g)
28. USES OF BLEACHING POWDER
Bleaching powder is used for disinfecting drinking water.
Bleaching powder, CaOCl2 or calcium oxychloride is used to
kill germs and bacteria of water because it
contains chlorine element, which is good disinfecting agent.
It is used for bleaching dirty clothes in the laundry, as a
bleaching agent for cotton and linen in the textile industry.
It is a strong oxidizing agent hence used as an oxidizer in
many industries.
It is used as a disinfectant which is used for
Disinfecting water to make potable water.
For bleaching wood , cotton , pulp, hair etc
31. Baking Soda
Common name: Baking soda
Chemical name:Sodium hydrogen carbonate or Sodium
bicarbonate
Chemical formula:(NaHCO3)
Nature: Basic
Appearance: white crystalline solid
Solubility: soluble in water
Preparation:
Baking soda is prepared by passing CO2 through ammoniated
brine solution.
NaCl + H2O + CO2+ NH3 → NH4Cl + NaHCO3
32. USES OF BAKING SODA
It is used as a base in laboratory.
It is used to make washing soda.
It is used as an ingredient in antacids.
It is also used in soda acid fire extinguisher
It is used for making baking powder, which is a mixture of
baking soda and mild edible acid such as tartaric acid.
When baking powder is heated or mixed with water, the
following reaction take place
NaHCO3 + H+ → CO2 + H2O + Sodium salt of acid
CO2 produced during this reaction makes bread or cake or dhokla or idli
soft and spongy
On heating , baking soda produces sodium carbonate along with
water and carbondioxide.
NaHCO3 + Heat → CO2 + H2O + Na2CO3
33.
34.
35. BEST USES FOR BAKING SODA
FOR HEALTH
Add baking soda to your bath water to relieve sunburned or
itchy skin.
Make a paste of baking soda and water, and apply to a burn
or an insect bite for relief.
If you crave sweets, rinse your mouth with one-teaspoon
baking soda dissolved in a glass of warm water. Don’t
swallow the mixture; spit it out. Your craving should
disappear instantly.
To remove pesticides, dirt, and wax from fresh fruits and
vegetables, wash them in a large bowl of cool water to which
you’ve added two to three tablespoons of baking soda.
36. IN THE KITCHEN
Clean your refrigerator with a solution of one-teaspoon
baking soda to one quart of warm water.
Pour a cup of baking soda into the opening of your clogged
drain and then add a cup of hot vinegar. After a few minutes,
flush the drain with a quart of boiling water.
To remove stains from your coffee and tea cups, wipe them
with a damp sponge dipped in baking soda paste.
Boil two inches of water in a pan with a burned bottom, turn
off the heat, then add half a cup of baking soda. Let it sit
overnight. In the morning it will be easy to clean.
Sprinkle a teaspoon of baking soda on the bottom of your
toaster oven to eliminate the burned smell from drippings
and crumbs.
37. IN THE BATHROOM
Soak toothbrushes in baking soda and warm water
overnight to clean bristles.
Keep your rubber gloves dry and smelling good by
sprinkling baking soda inside them. They’ll slip on more
easily too!
ON CLOTHING
To remove perspiration stains, make a thick paste of
baking soda and water. Rub paste into the stain, let it sit
for an hour, and then launder as usual.
Gasoline and oil odors can be removed by putting
clothes in a trash bag with baking soda for a few days
before washing them.
38. MISCELLANEOUS USES OF BAKING SODA
Add a pinch of baking soda to boiled syrup to prevent it
from crystallizing.
Lay down a barrier of baking soda under sink-pipe openings and
along basement windows to keep carpenter ants, silverfish, and
roaches from invading. Roaches eat the baking soda, dehydrate,
and die.
A light baking soda paste on a damp cloth will remove bugs and
tar from cars without damaging the paint. Let paste sit for a few
minutes before wiping and rinsing clean.
Sprinkling baking soda on your front steps will provide traction
and melt the ice. Unlike rock salt, kitty litter, or sand, it won’t
damage outdoor or indoor surfaces or shoes.
A paste of baking soda removes red sauce stains from plastic.
39. WASHING SODA
Common name: Washing soda
Chemical name: sodium carbonate decahydrate
Chemical formula: Na2CO3 . 10H2O
Nature: Basic
Appearance: white crystalline solid
Preparation of washing soda by Solvay Ammonia Process:
When CO2 is passed through ammoniated brine solution, insoluble
sodium bicarbonate is produced.
NaCl + H2O + CO2+ NH3 → NH4Cl + NaHCO3
sodium carbonate is obtained by heating baking soda.
2 NaHCO3 + heat →Na2CO3 + H2O + CO2
Then washing soda is produced by recrystallisation of sodium carbonate
Na2CO3 + 10H2O → Na2CO3 .10H2O
40. USES OF WASING SODA
It is used in glass, soap and paper industry.
It is used for removing permanent hardness of water
It is used as a laboratory reagent
It is used as a cleansing agent for domestic purpose
In laundries and in softening of water as washing
soda.
In the manufacture of glass, sodium silicate, paper,
borax, soap powder, caustic soda etc.
In textile and petroleum refining.
For the preparation of various carbonates of metals.
41.
42.
43. How do you make washing soda with baking
soda?
Washing Soda Instructions
Turn oven on 400 degrees F.
Pour a thick (1/2 inch or so) layer of baking soda on the
bottom of the baking dish.
Bake for 1 hour, stirring 1-2 times in the middle, or until it has
changed in look and feel. ...
Let cool and store in air-tight jar.
44. What is the role of tartaric acid in
baking soda?
Tartaric acid is a weak and mild acid. It is
mixed with baking soda to prepare baking
powder. When baking powder is used in
batters, the tartaric acid reacts with baking
soda and neutralizes the bitter taste without
affecting its ability to produce CO2 and H2O.
If tartaric acid is not added in baking powder,
the cake will taste bitter due to the presence of
sodium carbonate.
52. PLASTER OF PARIS
Common Name:plaster Of Paris
Chemical Name:calcium Sulphate Hemihydrate
Chemical Formula: CaSO4. ½ H2O
Appearance: white powder
Preparation:
It is prepared By Heating Gypsum At 373k.
CaSO4. 2H2O(heat At 373k) → CaSO4. ½ H2O + 1½ H2O
53. USES OF PLASTER OF PARIS
.It is called plaster of Paris because it is obtained from gypsum
and is found in Paris
It is used for plastering of fractured bones.
CaSO4. ½ H2O + 1½ H2O → CaSO4. 2H2O(heat At 373k)
POP Gypsum
Making toys, statues, models , decorative items etc.
Smoothening of walls of the room, Ceiling purposes.
As a fire proofing material.
for making blackboard chalks.
It is used in dentistry and laboratories
55. HYDRATED SALTS
Salts having water molecules ie water of
crystallisation in their formula unit is called
Hydrated salts.
The water molecules which form part of the
structure of a crystal are called water of
crystallisation.
The water of crystallisation gives the crystals
of the salts their shape and colour.
56.
57. How are hydrated salts formed?
When salts crystallize from an aqueous
solution, the ions may retain some of
the hydrating water molecules and form solid
hydrates such as Na2CO3·10H2O and
CuSO4·5H2O.
Both the size of the ion and its charge control
the extent of hydration. ...
As a result, small cations are more
extensively hydrated than large cations.
58. What are hydrates used for in real life?
Gypsum is commonly used in the manufacturing of
wallboard, cement and plaster of Paris
Borax is used in many cosmetic, cleaning and
laundry products
Epsom salt is used as a natural remedy and
exfoliant.
Hydrates are often used in skin care products to
infuse moisture into the body
59. WATER OF CRYSTALLISATION
It is defined as the fixed number of water molecule present in
one formula unit of the salts.
SALT Chemical
Formula
Water of
Crystallisation
Washing soda Na2CO3 .
10H2O
10
Baking soda Na2CO3 Zero(0)
Gypsum CaSO4. 2H2O 2
Plaster of paris CaSO4. ½ H2O 1/2
Hydrated Copper sulphate (Blue Vitrol) CuSO4.5H2O 5
Ferrous sulphate (Green Vitrol) FeSO4. 7H2O 7
Epsom salt MgSO4∙7H2O 7
Zinc Sulphate(White Vitrol) ZnSO4 .2 H2O 2
Glauber's salt (sodium sulfate decahydrate) Na2SO4∙10H2O 10
Borax (sodium tetraborate decahydrate) Na2B4O7∙10H2O 10