, Research Paper
Thanks to Doc Brown of ChemHelp.Net for these great chemistry revision notes. Check out his site for more!
(a) High Melting Point and Boiling Point The bonding between the atoms in transition metals is very strong. The strong
attractive force between the atoms is only weakened at high temperatures, hence
the high melting points and boiling points. For example: iron melts at
1535?C and boils at 2750?C BUT a Group 1 Alkali Metals such as sodium melts at
98?C and boils at 883?C. (b) High density Another consequence of the strong bonding between the atoms in transition
metals is they are tightly held together to give a high density. For example: iron has a density
of 7.9 g/cm3 and sodium has a density of 0.97 g/cm3 (and
floats on water while fizzing! water has a density of 1.0
g/cm3). (c) Form coloured compounds and ions in solution Transition metals tend to form more coloured compounds more than other
elements either in solid form or dissolved in a solvent. The colours of some
transition metal salts in aqueous solution are shown below. 1
2
3
4
5
6
7
8
9
10
Sc – scandium salts such as the chloride, ScCl3, are colourless
and not typical of transition metals
Ti – titanium(III) chloride, TiCl3, is purple
V – vanadium(III) chloride, VCl3, is green
Cr – chromium(III) sulphate, Cr2(SO4)3, is
dark green
Mn – potassium manganate(VII), KMnO4, is purple
Fe – iron(III) chloride, FeCl3, is yellow-orange-brown
Co – cobalt sulphate, CoSO4, is pinkish
Ni – nickel chloride, NiCl2, is green
Cu – copper(II) sulphate, CuSO4, is deep blue
Zn – zinc salts such as zinc sulphate, ZnSO4, are usually
colourless and not typical of transition metals (d) Catalytic Properties (1) The metallic elements themselves Many transition metals are used directly as catalysts in industrial chemical
processes and in the anti-pollution catalytic converters in car exhausts. For example iron is used in the Haber Synthesis of ammonia: Nitrogen + Hydrogen ? Ammonia or N2 + 3H2 ? 2NH3 via the Fe catalyst
atoms (2) The compounds of transition metals As well as the metals, the compounds of transition metals also acts as
catalysts. For example manganese dioxide (or manganese(IV) oxide), MnO2, a black powder,
readily decomposes an aqueous solution of hydrogen peroxide: Hydrogen peroxide ? water +
oxygen or 2H2O2 ? 2H2O + O2 via MnO2 as the catalyst
Другие работы по теме:
A Long Hard Road Of Adolescenc Essay
, Research Paper A Long Hard Road of Adolescence Reading through the novel, Go Ask Alice, finding out all of the unbelievable, yet true, experiences and feelings of Alice is quite shocking. No matter how shocking they may seem, you can very easily relate those experiences and feelings to those of a typical day-in and day-out teenager.
Men Women And Conversation Essay Research Paper
Conversation Some piece of writing on human characteristics can either relate to an individual or it has no relevance and the individual would then disagree. In the articles His Talk, Her Talk by Joyce Maynard and Man to Man, Woman to Woman by Mark Sherman and Adelaide Haas both topics are about the different communication characteristics the different sex possess.
Covalent Bonds Essay Research Paper The first
Covalent Bonds Essay, Research Paper The first ionization energy IE1 is the energy required to remove the one electron from a gaseous atom. With this the effective nuclear charge increases and thus it takes more energy to remove the next electron. IE2 is always greater than IE1. Each subsequent electron becomes harder to remove.
Alchemy Essay Research Paper Alchemy is not
Alchemy Essay, Research Paper Alchemy is not just the changing of base metals into gold as most people think, although that was one of the goals people tried to achieve through alchemy. Alchemy is stemmed from astrology; both make attempts to understand mans relationship to the universe and exploit it. While astrology is concerned with the stars alchemy is concerned with the elements of nature.
Secret Identity Essay Research Paper Clark Kent
Secret Identity Essay, Research Paper Clark Kent is a mild-mannered reporter for the ?Daily Planet? newspaper. Born and raised in Smallville, Kansas; he now lives alone in an apartment in downtown Metropolis. He fits the mold of the stereotypical business man in any bustling city of commerce. With his suit, briefcase, and cellular phone, he can?t blend in more thoroughly, but who am I kidding? Underneath that tailored suit lies another person with a big ?S? on his chest.
Convergence Of The Twain Essay Research Paper
“The Convergence of the Twain” Personification is “endowing inanimate objects or abstract ideas with life or human characteristics” (Kirszner 2058). In the poem “The Convergence of the Twain” the author?s use of personification allows the reader to make a more fluid transition from the past to the present.
Good Or Evil Essay Research Paper Is
Good Or Evil Essay, Research Paper Is Man Inherently Good, Bad, Both? Psychologists often struggle with the question does man have inherently good characteristics, or do they lead to the negative. What makes a man act the way he does? Is it nature, hormone imbalances, or the way he is raised? Man s intrinsic characteristics can be good bad or both.
Element Essay Research Paper What is an
Element Essay, Research Paper What is an element: Simple substances that can not be broken down into simpler substances. What is an atom: smallest part of an element that can be identified as an element.
Alchemy Essay Research Paper Alchemy Alchemy is
Alchemy Essay, Research Paper Alchemy Alchemy is an ancient art, practiced in the Middle ages,used to discover a substance that would transmute common or base metals into gold or silver ,and to find a way of prolonging human life.The main objective of alchemy was to discover a substance called the philosopher’s stone.This stone was thought to transform common metals such as lead into silver or gold.Another objective of alchemist was to find the “elixir of life”- a potion that would cure all diseases and prolong life.
Characteristics Of A Leader Essay Research Paper
Characteristics of a Leader Think of some important leaders you know, whether they are good or bad. They may be ancient, modern, made-up, or real. There are certain characteristics that make them a good leader, and, in the same line, a bad leader. In my opinion, the three most important good qualities of leader are honor, loyalty, and putting the people ahead of you.
Bonding And Elements Essay Research Paper Element
Bonding And Elements Essay, Research Paper Element ? a substance which cannot be broken down into two or more substances by any means. Only contains one type of atom. Compound ? a substance in which atoms of two or
Gatsby Essay Essay Research Paper Gatsby EssayWho
Gatsby Essay Essay, Research Paper Gatsby Essay Who is the real hero of the novel Nick or Gatsby ? discuss In the novel the great Gatsby we can look at two people as the heros, but they are both heros in a different manner . Nick could be seen as a hero because of the way he struggled to help Gatsby realize his dream and the other hero is Gatsby himself who we can see as a hero because of the way he took the blame for the woman he loved and she didn t even acknowledge him after his death .
Recongizing A Liar Essay Research Paper
Eng 101-032 25, October 1999 Recognizing a Liar Over the years, I have been exposed to many varieties of liars. From this exposure I have acquired the talent of recognizing the characteristics of a liar. I have managed to separate them in
Holden Caulfield Essay Research Paper Sexuality Boy
Holden Caulfield Essay, Research Paper Sexuality/ Boy Code As a Teen Holden Caulfield, is portrayed in Catcher in the Rye as an adolescent boy struggling to find his own identity, possesses many characteristics that easily link him to the typical teenager. Holden s actions are those that any teenager can clearly relate to.
Space Colonization Essay Research Paper SPACE COLONIZATION
Space Colonization Essay, Research Paper SPACE COLONIZATION My five minute essay topic is space colonization. There are three places that I know of that the human race has thought of colonizing . They are: The largest asteroid that is orbiting in our solar system, the Moon and Mars.
Transition Elements Essay Research Paper Transition Elements
Transition Elements Essay, Research Paper Transition Elements, series of chemical elements that share similar electron orbital structures and hence similar chemical properties. The transition elements are commonly defined as the 30 elements with atomic numbers 21 to 30, 39 to 48, and 71 to 80.
Sulfuric Acid Essay Research Paper Sulfuric AcidFew
Sulfuric Acid Essay, Research Paper Sulfuric Acid Few chemicals affect people’s lives in as many ways as does sulfuric acid. It is used in making thousands of everyday products and has been called the single most important indutrial chemical. One of its most familiar uses is in automobile batteries. Sulfuric acid is alos used in such manufacturing processes as the production of fertilizers, drugs, detergents, and many metals.
Tragic Hero Media Essay Research Paper A
Tragic Hero (Media) Essay, Research Paper A Hero of Another Kind The tragic hero is usually not like an everyday person that is seen on the street. According to Aristotle’s book, Poetics, four characteristics establish the essence of a tragic hero. This is very helpful in understanding why the tragic hero is a mediocre type of person.
Some Reminders About The Periodic Table Essay
, Research Paper Thanks to Doc Brown of ChemHelp.Net for these great chemistry revision notes. Check out his site for more! The elements are laid out in order of Atomic Number Hydrogen, 1, H, does not readily fit into any group
Al Gore Essay Research Paper Democratic presidential
Al Gore Essay, Research Paper Democratic presidential candidate Al Gore went to the Florida Supreme Court today to call for an immediate count of some 14,000 disputed Florida ballots. Meanwhile, the Bush team pressed ahead with transition plans, and Florida legislators considered a special session to name electors.
Iron Essay Research Paper Iron Fe While
Iron Essay, Research Paper Iron While my study on iron i found that iron is actually an important element. I always thought of it as just a metal but it has many other uses. While reading this report you
Why Frankenstein Can Be Considered Gothic Literatu
Essay, Research Paper Essay-Why Frankenstein can be consider Gothic Literature The Novel Mary Shelley’s Frankenstein can be considered Gothic literature for many reasons. Besides the obvious, such as the time it was written, there are many different ways to interpret this thesis. The setting, plot, and the stereotypical female role will be examined to justify the thesis.
Typical Westerns Essay Research Paper justyn dallmannTypical
Typical Westerns Essay, Research Paper justyn dallmann Typical Westerns I think that Stephen Crane used alto of ideas from typical writings. I say this because some of the things were not typical but many of them were. This made the story unique because it wasn’t the same as most other westerns but in some ways it was the same.
The Typical Aussie Essay Research Paper I
The Typical Aussie Essay, Research Paper I am here to talk to you today about the typical australian, or if you prefer, the typical aussie. Australia is one of the greatest countries in the world, today. Not only for its
Is Holden Caufield A Typical Tennager Of
Today? Essay, Research Paper Holden Caulfied in my opinion is a strange person who seems to keep to himself. In some ways he can and can?t be considered a typical teenager of today.
The Characteristics Of MrsDickinson Essay Research Paper
Everyone should has his own characteristics. Some of those characteristics should be positive while some should be negative, and they might be changed as time passes and things happens. Throughout the story “Tears, Idle Tears” , the author shows that Mrs.Dickinson has characteristics of beautiful, independent and demanding person.
Misanthrope Essay Research Paper The Misanthrope like
Misanthrope Essay, Research Paper The Misanthrope, like most plays, has few women characters. There are three female individuals, one of who plays a major role, and two whomreferred to as foil characters. Arsinoe, one of the foil characters, expresses Moliere’s opinion that women are gossipers. The other female character is Eliante who foils out Alceste’s passionate nature.
Typical American By Gish Gen Essay Research
Paper Gish Jen’s Typical American – To what extend did Ralph Chang become a typical American? According to the dictionary: If something is typical it shows all the characteristics that you would expect from a stated person, thing or group. Something which is typical might also show all the bad characteristics that you expect from someone or something, often in a way that is annoying. (Dictionary)
MendeleevPeriodic Table Essay Research Paper Dimitri Mendeleev
Mendeleev/Periodic Table Essay, Research Paper Dimitri Mendeleev & The Periodic Table Derived by Dimitri Mendeleev, the periodic table may be one of the most informational tables contained in chemistry. By leaving gaps in the columns and rows, Mendeleev was allowing for the discovery of undiscovered elements of that time.
Hot Dog Essay Research Paper The Night
Hot Dog Essay, Research Paper The Night I Became a Convict (Well it sure seemed like it) Introduction: Police Sirens glaring ? lights flashing ? nervous and full of fright
Superconductors Essay Research Paper Super conductivity is
Superconductors Essay, Research Paper Super conductivity is a natural phenomenon in which certain materials such as metals, alloys, and ceramics, can conduct electricity without resistance. These materials are what we call superconductors. In a superconductor, once the flow of electrons begins, it essentially goes on forever, making it an important material to humans.