(In a class there is a teacher who is explaining the material to his
students about the element
of halogen that is clor. Where the teacher explains
the lesson then returns to the student about his understanding of the material
that has been conveyed)
Teacher: good morning children
Student: morning teacher
Teacher: before studying let us pray first, try who will lead the prayer ahead?
Diamon: me, ma'am
Teacher: yes diamond please come forward to lead the prayer
(Prayer underway)
Teacher: At this meeting the mother will explain the material about the clor
element.
And the goals of today's learning are:
1. Students can find out what is clor, and how the nature of clor.
2. Students can understand the usefulness of clor
3. Students can know how to make clor elements.
Teacher: ok ... before last week we've already learned about this material. That
is about the element of flour. Do children still remember what is flourine.
Fani : Me, Mom.
Flourine is an element in the periodic table that has the symbol F and atomic
number 9.
Teacher: yes it is true, Fluorine is an element in the periodic table that has the
symbol F and atomic number 9. Its name is derived from the Latin fluere, meaning
"to flow". It is the most chemically and electronegatively reactive
yellow-green toxic halogen gas of all the elements. . Well here anyone still
remember what use of flourine?
Sinta : I'm bu ..
Teacher: oh nails ... please forward son
Sinta: Atoms and fluorine molecules are used for plasma etching in semiconductor
manufacturing, flat panel display production, and MEMS fabrication. Fluorine is
indirectly used in the production of scratch resistant plastics such as teflon,
freon production, and in the production process of uranium.
Fluorochlorohydrocarbon.
In air conditioners and cooling machines. Fluorine is often added to toothpaste to prevent
cavities.
Teacher: the greatest waduh the reading turned out to be very smooth yes, children's applause,
Well after knowing the element of the flourine, the mother will explain the next material about
clor. Chloros, "pale green"), is a chemical element with the symbol Cl and atomic number 17.
In the periodic table, this element belongs to the halogen group or group 17 (the old system:
VII or VIIA). In the form of chloride ions, these are the salt-formers and other compounds
available in nature in abundant quantities and are necessary for the formation of almost all
life forms, including humans. In the form of gas, chlorine is greenish yellow, and very
poisonous. In liquid or solid form, chlorine is often used as an oxidant, bleach, or disinfectant.
Is there still no understanding?
Rina: already bu ...
Teacher: hemmm ... very clever mother's children. Well, if you already understand it means mother
who will ask, Who can give us an example of usability from clor.
Sari : I'm mam
Teacher: ok please ...
Sari : Purpose of chlorine element is:
• Chlorine is widely used for water purification because it can kill bacteria.
• Used for the production of DDT, Gamaxane and many more useful compounds.
• Chlorine is used as a bleach.
• It is used for the synthesis of organo compounds such as 1, 2 - dioloroethane and Vinyl chloride.
Teacher: yes ,, right answer. Then can anybody give an example of the act of clor element?
Reni : I'm mam
Teacher: ok please, how about the process of making it?
Sinta : (give examples)
Teacher: Well then the mother will form 6 groups consisting of 4 people
Here the mother will share the elements that you will discuss. The task is that each group
makes a paper about halogen element, halogen element consists of 7, so group 1 material
He, group 2 Ne, group 3 Ar, group 4 Kr, group 5 Xe, group 6 Rn. What you will discuss
is the nature, usefulness and mode of manufacture of these elements. Okay kids because
the time is up, please this task you do at home and next week gathered. And do not forget
to understand your material because next week my mother will ask about your each material.
Well, let's end this meeting today. Please go home and see you next week
Student: (together) walaikumsalam wbr, see you mom.
Fluorine is indirectly used in the production of scratch resistant plastic such as Teflon. What if we use teflon to cook, does the chemical compound yeng become the base of manufacture does not react? What it would be danger to the food content
BalasHapus
HapusThe basic ingredient of teflon or polytetrafluoroethylene (PTFE) is solid fluorocarbon, because the molecular weight of the compound is composed entirely of carbon and fluorine. In the process of making Teflon, another chemical substance called Perfluorooctanoic acid (PFOA or C8) is an ammonia salt. This substance is used as a surfactant in a PTFE polymer emulsion.
The POFA is of concern to researchers because it can lag in the environment and accumulate in the human body for a very long time. Blood tests on the American population indicate the presence of POFAs that are left behind even in small quantities. Recently the US Environtmental Protection Agency (EPA) has defined POFA as a possible substance that is carcinogenic to humans. Further research is still done to determine the levels of carcinogens that become the reference. Several other adverse effects have been studied such as elevated cholesterol levels in Teflon plant workers.
Fortunately, POFA is used in the Teflon manufacturing process, only a few levels are still detected in the final product of Teflon.
Currently, the EPA has not made a definite recommendation as to whether people should avoid using Teflon or not.
PTFE has a relatively high melting point (due to the force of attraction between the chains) and is very resistant to chemical attack. The carbon chain is so attached to the fluorine atoms that no one can reach it to react with it. It is beneficial in the chemical industry and in the food industry to coat the container and make the containers immune to almost anything that can make it corrosive.
Chlorine although it has benefits but there is also a negative footprint in its use, what are the effects of chlorine misuse.
BalasHapus
HapusShort-term chlorine side effects
According to the Review, short-term side effects of this drug include:
Worry
Weight sweats
Hypertension
Insomnia
Severe headache
Pounding
Vibration
Difficulty breathing
Dry mouth
Muscle spasms
Increased heart rate
Long term side effects may include:
• Cardiac muscle hypertrophy
• Arrhythmias
• Heart degeneration
• Decreased bone strength
• Hypertension
• Increased heart rate
• Insomnia
• Tachycardia
• High blood pressure
• Thyrotoxicosis
• Subaortic stenosis
Mention the properties of fluorine physics?
BalasHapusFluorine is a univalent, pale yellow-green halogen gas, and is the most reactive element and has the highest electronegativity.
HapusFluorine occurs naturally in the earth's crust and can be found in rocks, coal, and clay.
Fluorine is the 13th most abundant element in the Earth's crust with a concentration of 950 ppm.