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Deconstruction: What is the best method of classifying chemical…
Deconstruction: What is the best method of classifying chemical substances?
What is a chemical substance?
Chemical substances are matter, composed of compounds created from atoms that have been chemically bonded together.
How are atoms bonded to create a chemical substance?
Metallic bonds are a type of chemical bond that are created by the electrostatic attraction of positively charged metal ions and electrons. Transition metal atoms that are postivly charged are bonded by free flowing electrons acting like a glue.
A lot of energy is needed to overcome these bonds reulting in high melting and high boiling points for mettallic chemical substances. As these electrons can move free flowing chemical substance with mettallic bonds are great electricity and heat conductucters. These bonds also are sturdy and malleable.
Covalent bonds refer to the sharing of electrons between two or more atoms. (Britannia N.D) This sharing of electrons is needed to stabilise the atoms since there are no enough electrons in which they can be evenly paired. No conductivity. Covalent bonds also do not conduct electricity as they are formed between 2 non metals. Covalent Bonds are brittle meaning they will break when storng force is placed on them rather than change shape.
Ionic bonding is the transfer of electrons to achieve stability in an atom. (BYJUS n.d). Ionic bonds are strong having a high melting and boiling point and are good conductors of electricity when in liquid state. Ionic bonds are
What are molecules?
Molecules are two or more atoms that are chemically bonded
What are compounds?
Compounds are chemical substances of two or more atoms from separate elements, that are chemically bonded together
How can chemcial substances be classified?
Chemical Substances can be classified through the ionic , metallic and covalent bonds between atoms.
A conductivity test can classify chemical substances that contain metallic bonds, ionic bonds and covalent bonds as metallic bonds conduct in any state, ionic bonds conduct in water, while covalent do not conduct.
A conducitivty test Is done after a malleability test , as a malleability test determines if the bonds in a chemical substance are metallic or not. Then a conducitvity test in water can find wether the bonds are ionic or covalent as covalent bonds do not conduct electricity while ionic do so in liquids.
A solubility test can classify chemical substances that metallic bonds, ionic bonds and covalent bonds as ionic bonds divolve in a solvent, while covalent bonds and metallic bonds do not
A solubility test can be done after a malleability test, since ionic compounds dissolve in liquids, while covalent bonds do not dissolve
A malleability test can classify chemical substances that metallic bonds, ionic bonds and covalent bonds, as chemical substances with ionic and covalent bonds are brittle being broken easily while metallic bonds are malleable, being shaped and streched.
A malleability test would be done first , as it could could directly find or eliminate one possible classification for a chemiclal substance.
Chemical Substances can be classified by the state of matter they are
Room Temperature Test: Chemical substance can be classified on its state of matter at room temperature
Objects are left at room temperature classifyed on state of matter
Chemical Substances can be classified by whether the substances are acidic, alkaline or neutral.
A PH test can be of the substances in liquid state.
Substance is melted so it is in liquid state. PH is recorded
What are the limitations to these methods?
Room Temperature Tests
Chemical Substances that are at gas state at room temperature limit these methods, as there is a lack of equipment to encapsulate these gases.
Conductivity tests
The temperature of an envrionment can influence the conducivity of chemical substances
Solubility tests
Certain Solvents cannot dissolve certain solutes,
Certain solutes may take a prolonged amount of time than other solute to dissolve.
What are the risk assessments to these methods?
Solubilty
Solubility Test:
Chemical Exposure,Inhalation of Hazardous Substances,Fire Hazard,Electric Shock,Inadequate,Personal Protective Equipment (PPE),Inadequate Ventilation,Lack of Safety Protocols
PH
pH Test:
Chemical Exposure,Inhalation of Hazardous Substances,Fire Hazard,Electric Shock,Inadequate,Personal Protective Equipment (PPE),Lack of Safety Protocols
Room Temperature
Room Temperature State of Matter Test:
Equipment Failure, Contamination, Electric Shock Chemical Exposure ,Fire Hazard ,Inadequate Training ,Lack of Safety Protocols
Malleability
Malleability Test:
Equipment Malfunction,Inadequate Personal Protective Equipment (PPE),Physical Injury from,Sharp Objects,Chemical Exposure,Fire Hazard,Inadequate Training,Lack of Safety Protocols
Conductivity
Conductivity Test Risks: Electric Shock Chemical Exposure Fire Hazard Malfunction Risk Separation Technique Risks: Chemical Exposure Fire Hazard High Temperatures Pressure Buildup