IONIC COMPOUNDS In chemistry‚ an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually‚ the positively charged portion consists of metal cations and the negatively charged portion is an anion or polyatomic ion. Ions in ionic compounds are held together by the electrostatic forcesbetween oppositely charged bodies. Ionic compounds have high melting and boiling points‚ and they are hard and very brittle. Ions can be single atoms‚ as the sodium and chlorine in
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The compound is the substance that can be two or more elements that can be changed. Water is a compound. It contains both Hydrogen and oxygen that can stand alone by itself. The mixture is when two different substances that are blended together. The air is a mixture of these elements carbon dioxide‚ nitrogen‚ and other stuff. Most mixtures are known to be naturally. The main difference between the compound and the mixture is how they are combined. In the pure substance‚ the only way to know if
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Elements and compounds are a result of the actions of the valence electrons. There are three types of bonds that I have learned about in the bonding comparison lab. These bonds include ionic‚ polar covalent‚ and non-polar covalent. Each of these bonds and the element compounds connected to them has individual solubility‚ conductivity‚ melting point‚ and volatility levels. The three element compounds that will follow are sodium chloride‚ sucrose‚ and p-dichlorobenzene. Sodium chloride is an ionic bond.
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CChemistry Exam #2 Study Guide (10/07/12) I. Bonding a. Ionic Bonding i. Electrons are transferred ii. Ions are held together by electrostatic force b. Covalent Bonding iii. Electrons are somehow shared iv. Electrons are attracted to nuclei (shared) II. Electronegativity c. The ability of an atom in a molecule to attract shared electrons to itself d. Measured on Pauling Scale e. Most electronegative: Fluorine.
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solids – ionic and molecular solids. • To classify three unknown substances as ionic compounds‚ polar covalent compounds or non-polar covalent compounds. • To identify the three unknowns. Observations: A B C Solubility in: • H2O • 2-Propanol Soluble Insoluble Soluble Insoluble Insoluble Soluble Conductivity None High None Melting Point 100 – 525 ℃ > 525 ℃ < 100 ℃ Odour Subtle None Very Strong Concluding Questions: 1. Identify the type of solid in each unkown compound. Support
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Chapter 1: Introduction Chapter 1: Introduction Ionic liquids (ILs) can be viewed as a new and remarkable class of solvent. They are also a type of materials that have a long and useful history‚ where the earliest material that meets the current definition of IL was observed in the mid-19th century when a separate liquid phase called the “red oil” was observed in Friedel-Crafts reaction [17]. Over the following years‚ there has been a rapid growing of interest in ILs due to the realization
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Ionic Radius: Definition‚ Calculation‚ and Trends Atoms are microscopic particles that constitute all matter. Despite their tiny size‚ however‚ they can be measured. One way that certain atoms‚ called ions‚ are measured‚ is by ionic radius. The radius is different from an atomic radius and is influenced by the particles’ charges. Use the following information to understand this important measurement in chemistry. What is Ionic Radius? Ionic radius is‚ simply put‚ the radius of an ion. An ion is
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and Its Compounds Carbon: Introduction Atomic Number: 6 Electronic Configuration: 2‚ 4. Valence electrons: 4 Property: Non-metal Abundance:- Carbon is the 4th most abundant substance in universe and 15th most abundant substance in the earth’s crust. Compounds having carbon atoms among the components are known as carbon compounds. Previously‚ carbon compounds could only be obtained from a living source; hence they are also known as organic compounds. Bonding In Carbon:- The Covalent Bond Bond
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*Compound Interest/Discount* Compound Interest When you borrow money from a bank‚ you pay interest. Interest is really a fee charged for borrowing the money‚ it is a percentage charged on the principle amount for a period of a year - usually. If you want to know how much interest you will earn on your investment or if you want to know how much you will pay above the cost of the principal amount on a loan or mortgage‚ you will need to understand how compound interest works. * Compound interest
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complex metal ion? A complex is a molecule or ion formed by the reaction of two or more ions or molecules capable of independent existence. What is COMPLEXATION????? Chemical reaction that takes place between the metal ion and a molecular or ionic entity (known as ligand). Also known as Chilometric titration‚ Chilometry‚ Chilatometric‚ EDTA titrations. It is a form of volumetric analysis in which the formation of a colored complex is used to indicate the end point of a titration.
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