Wednesday, May 14, 2014
Your element in compounds and / or molecules!
Identify five compounds and / or molecules that your element is part of. Summarize the physical and chemical properties of each. Also link two you tube videos about two of the compounds. For example, the element sodium is in the compound sodium chloride (table salt) . Thanks!
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Argon has no common compounds because it is chemically inert so it does not react with other elements. One compound that scientists were able to make with argon is argon fluorohydride. Argon fluorohydride is stable at -233ºC, and it is argon´s only compound that was made in 2000.
ReplyDeleteI was unable to find videos about argon fluorohydride.
Maria B.
Carbon dioxide (CO2) - colourless odorless gas, which is soluble in water, in ethanol and in acetone; an acidic oxide and reacts with water to give carbonic acid, it is a linear covalent molecule; melting point is −78.5 °C and boiling point is −56.6 °C.
ReplyDeleteVideo of reaction of Carbon dioxide with Magnesium: https://www.youtube.com/watch?v=wqErrNvns4o
Carbon Monoxide (CO)- a colourless, odorless, neutral, gaseous oxide, which is highly poisonous; sparingly soluble in water, but is soluble in ethanol and in benzene; a flammable and highly toxic gas; melting point is −205.02 °C and boiling point is −191.5 °C.
Video: https://www.youtube.com/watch?v=lchtRTDsHSM
Carbon suboxide- polymerizes spontaneously to a red, yellow, or black solid; colorless gas; strong, pungent odor; melting point is −111.3 °C and boiling point is 6.8 °C.
Glucose (C6H12O6)- colorless and soluble in water; acetic acid; solid state; white powder; a monosaccharide (or simple sugar); the most important carbohydrate; sometimes called blood sugar; also commonly found bound to another sugar unit, called fructose, in the form of sucrose, or table sugar.
Methane (one atom of carbon and 4 atoms of oxygen)- simplest alkane; main component of natural gas; an attractive fuel; greenhouse gas; tetrahedral (central atom is located at the center with four substituents) molecule; colorless, odorless gas; flammable; reactions like combustion; melting point is −182.5 °C and boiling point is −161.49 °C.
Jae Hee L.
**H20: Oxygen is part of one of the world's most abundant compounds named 'water'. (Physical) In nature, water can be found as a gas, a liquid, and a solid. Some other physical properties of water are that it has high specific heat, that natural water has a neutral PH, that it is the second liquid, after mercury, that can conduct heat most easily, and that it is a universal solvent. (Chemical) Some chemical properties of water are that it has polarity, hydrophilic and hydrophobic molecules, and that it can act as solvent-acids & bases-pH-hydration.
ReplyDelete**CO2 - Oxygen is part of a compound called Carbon Dioxide which contains one atom of Carbon and two atoms of Oxygen. (Physical) Some physical properties of carbon are that it is a gas at room temperature and that it can take be a gas, liquid, or solid in different conditions. (Chemical) Some chemical properties are that carbon dioxide is non-flammable which is useful for fire-extinguishers, that carbon dioxide doesn't react with many substances, and that carbon dioxide displaces oxygen.
**H2O: Oxygen is part of a compound named hydrogen peroxide. (Physical) This compound is a clear colorless liquid at room temperature but can also be found as a solid and a gas. (Chemical) Hydrogen peroxide is a versatile and environmentally friendly chemical with a wide variety of applications. It is commercially available as aqueous solution in various concentrations and grades.
**KNO3: Oxygen is part of a compound named potassium nitrate that occurs as a mineral niter and is a natural solid source of nitrogen. (Physical) Potassium nitrate has an orthorhombic crystal structure at room temperature, which transforms to a trigonal system at 129 °C. Upon heating to temperatures between 550 and 790 °C under an oxygen atmosphere, it loses oxygen and reaches a temperature dependent equilibrium with potassium nitrite. (Chemical) Its chemical properties are that it is moderately soluble in water, but its solubility increases with temperature, that the aqueous solution is almost neutral, (pH 6.2 at 14 °C) that it is not very hygroscopic, absorbing about 0.03% water in 80% relative humidity over 50 days, that it is insoluble in alcohol and is not poisonous, and that it can react explosively with reducing agents, but it is not explosive on its own.
**COCl2: Oxygen is part of a compound named phosgene which was used as a chemical weapon during WW1. (Physical) At room temperature, phosgene is a colorless and suffocating gas and its melting point is -118 C and boiling point is 8.2 C. (Chemical) Phosgene's vapor pressure at 20C is 1215 mmhg, its vapor density is 3.5, and it decomposes in water.
VIDEOS:
-https://www.youtube.com/watch?v=HVT3Y3_gHGg
-https://www.youtube.com/watch?v=trhXiCxvzu4
Jeanne H.
Adam's catalyst/PtO2H2O/Platinum oxide hydrate- a dark brown powder that becomes a catalyst when it comes in contact with hydrogen and turns the platinum black. It is a black solid with a melting point of 450ºC. It has a density of 102.8 g/m3. It is insolube in water but dissolves in alcohol.
ReplyDeletePlatinum ditelluride/PtTe2- A grey cristalline solids with a melting point of 1200ºC.
Platinum oxide/PtO- A black cristalline solid with a density of 14100m3. It has a melting point of 325ºC.
https://www.youtube.com/watch?v=5A3eM53eZvc
Platinum sulphide/PtS- It takes the form of a grey crystalline solid of a green powder. It has a density of 10300m3.
Platinum diiodide/PtI2- A black crystalline solid. It has a density of 6400 kg/m3. It has a melting point of 360ºC.
Platinum bromide/PtBr2- A dark green powder. It has a density of 6.65 g/cm3 with a melting point of 250ºC.
https://www.youtube.com/watch?v=FSdBB1vBDKY
Patricia M.
Helium cannot bond with other elements to form compounds, its a noble gas that is very light and very weak. Also because it has two electrons, which completely fill the first electron energy level. Because they completely fill this level, helium will not try to borrow electrons. And, because the two electrons fill the energy level, it will not loan them out. As helium will not act to either borrow or loan out electrons, it is said to be chemically inert. It will not react with other elements. It won't even form a diatomic molecule with another atom of its own kind.
ReplyDelete-Vasi
Videos:
ReplyDelete1.https://www.youtube.com/watch?v=KlAl5RHAAns
2.https://www.youtube.com/watch?v=rM04U5BO3Ug
Compounds/Molecules with Nitrogen:
1. Nitrogen Trifluoride contains nitrogen. A fluoride, it's colourless, it's appearance is gas, its melting point is -207°C, it's boiling point is -129°C, and it's density is 3.1 kg m^-3.
2. Nitrous Oxide contains nitrogen. An oxide, it's colourless, it's appearance is gas, it's melting point is -90.81°C, it's boiling point is -88.46°C, and it's density is 1.9 kg m^-3.
3. Dinitrogen pentoxide contains nitrogen. An oxide, it's white, it's appearance is crystalline solid, it's melting point is 30°C, it's boiling point is 47°C, and it's density is 2050 kg m^-3
4. Nitrogen Trichloride contains nitrogen. A Chloride, it's yellow, appearance is liquid and explosive, it's melting point is -40°C, it's boiling point is 71°C, and it's density is 1650 kg m^-3.
5. Nitrogen Triiodide contains nitrogen. An Iodide, it's black, it's appearance is crystalline solid and explosive. It has no melting point, boiling point, or density.
-Gabriel F.A.
Videos: Correction
Delete1. https://www.youtube.com/watch?v=Rx0YKW3yh9I
2. https://www.youtube.com/watch?v=z8C0iO2Y_CY
-Gabriel F.A.
-Tantalum Nitrate: (TaN) it is a black crystalline solid. It has a 3090ºC melting point and it has the density of 13700 kg m-3.
ReplyDelete-Tantalum Disulphide: (TaS2) it is a black crystalline solid. It has a 3000ºC melting point, with a density of 6860 kg m-3.
-Tantalum Pentaflouride: (TaF5)4 it is a white solid crystalline. With a 97°C melting point and a 229°C Boiling point. It also had a 5000 kg m-3 Density point.
-Tantalum Decabromide: (TaBr5) it is a pale yellow or orange crystalline solid. With a 280°CvMelting point and a 345°C Boiling point. With a 5000 kg m-3 Density.
- Tatalum Dioxide: (TaO2) it is a gray or brown crystalline solid.It does not have a melting point or a boiling point. it has a 10000 kg m-3 Density point.
youtube:
http://youtu.be/NjI1z_D2w9U
http://youtu.be/iMSYG4HW4zA
--Joaquin C.
-Xenon difluoride: (XeF2) is a dense, white crystalline solid. It has a nauseating odour and low vapor pressure. It is moisture-sensitive. It decomposes on contact with light or (slowly) water vapour. It has a molar mass of 169.29 g mol−1, a density of 4.32 g/cm3, a melting point of 128.6 °C and a boiling point of 25 g/l (0 °C).
ReplyDelete-Xenon dioxide:(XeO2) yellow-orange solid. It is an unstable compound, with a half-life of about two minutes, disproportionating into XeO3 and xenon gas. Its molecular mass is 163.29 g/mol.
-Xenon hexafluoride: (XeF6) At room temperature, it is a colorless solid that readily sublimes into intensely yellow vapors. It has a molar mass of 245.28 g mol-1, a density of 3.56 g cm-3, a melting point of 49.25 °C and a boiling point of 75.6 °C.
-Xenon oxytetrafluoride: (XeOF4) It's a colorless liquid. It is extremely reactive and unstable, and hydrolyses in water to give dangerously hazardous and corrosive products. It has a molar mass of 223.23 g/mol, a density of 3.17 g/cm3 and a melting point of −46.2 °C. It reacts with water.
-Xenon hexafluoroplatinate: (Xe+[PtF6]−) it is an orange solid. Its molar mass is 440.367 and it's prepared from Xenon and Platinum Hexafluoride.
-Xenon trioxide: (XeO3) It's a colourless cristalline solid. Its molar mass is 179.288 g/mol, its density is 4.55 g/cm3 and it's soluble with water, but it reacts to it. It is a very powerful oxidizing agent, and liberates oxygen from water slowly (and xenon), accelerated by exposure to sunlight. It is dangerously explosive upon contact with organic materials. When it detonates, it releases xenon and oxygen gas.
Youtube videos:
https://www.youtube.com/watch?v=QLk0wCFZrfA
https://www.youtube.com/watch?v=PjtTqT2j9sQ
Jie H.
Krypton
ReplyDeletePhysical properties:
Melting point of krypton is -157.36°C.
Boiling point of krypton is -153.22°C.
Colorless
odorless
tasteless
Krypton is found in gaseous state in its normal environment
Chemical properties:
The Electronegativity of Krypton is 3.00 (Pauling scale)
krypton has 6 isotopes
Krypton is an inert radioactive gas
It has 6 stable isotopes
It can be produced by the fission of uranium and plutonium
Laura L.
1. Silver Fluoride (AgF)
ReplyDeletePhysical: Color: yellow, Appearance: crystalline solid, Melting point: 435°C, Boiling point: 1150°C, Density: 5852 kg m-3
Chemical: Water soluble, Boron reacts explosively when on ground with Silver fluoride, Odorless yellow to gray solid. Sinks and mixes with water.
2. Silver Chloride (AgCl)
Physical: Color: white, Appearance: crytalline solid. Light sensitive, Melting point: 455°C, Boiling point: 1550°C, Density: 5560 kg m-3
Chemical: Solubility: 0.52x10-3gm/100gm H2O at 50° C.
3. Silver Iodide (Agl)
Physical: Colour: yellow, Appearance: crystallione solid, Melting point: 558°C, Boiling point: 1504°C, Density: 5683 kg m-3
Chemical: Stability: light-sensitive, incompatible with strong oxidizing agents.
4. Silver Oxide (AgO)
Physical: Colour: grey, Appearance: crstalline solid, Melting point: >100°C (decomposes to Ag and oxygen gas), Density: 7500 kg m-3
Chemical: Bonding: polar covalent, Ionic Character: 45.76 %
5. Silver Bromide (AgBr)
Physical: Colour: pale yellow, Appearance: crystalline solid. Light sensitive, Melting point: 430°C, Boiling point: 1533°C, Density: 6473 kg m-3
Chemical: Solubility, Qualitative:insoluble: acid 4
Videos:
https://www.youtube.com/watch?v=D_KEOiMTzxk
https://www.youtube.com/watch?v=g92pDGniG8g
Sofia K.
The term hydride is used to indicate compounds of the type MxHy and not necessarily to indicate that any compounds listed behave as hydrides chemically.
ReplyDeleteZinc dihydride: ZnH2- The term hydride is used to indicate compounds of the type MxHy and not necessarily to indicate that any compounds listed behave as hydrides chemically.
Fluorides
Zinc difluoride: ZnF2
Chlorides
Zinc dichloride: ZnCl2
Bromides
Zinc dibromide: ZnBr2
Iodides
Zinc diiodide: ZnI2
Oxides
Zinc oxide: ZnO
Zinc peroxide: ZnO2
-Pauline Gad