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Get Full Access to Chemistry: A Molecular Approach - 5 Edition - Chapter 24 - Problem 18
Get Full Access to Chemistry: A Molecular Approach - 5 Edition - Chapter 24 - Problem 18

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ISBN: 9780134874371 2047

## Solution for problem 18 Chapter 24

Chemistry: A Molecular Approach | 5th Edition

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Problem 18

In the pyroxene kanoite, the formula unit has two $$\mathrm{SiO}_{3}^{2-}$$ units and is balanced by manganese and magnesium ions. Determine the formula unit of kanoite. Assume that the oxidation state of Mn is +2.

Text Transcription:

SiO_3^2-

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Notes Day: 9-1-17 Notes – CHM 1240  Atoms have the ability to form a fixed number of bonds using their valance electrons (outermost electrons), for example carbon has the ability to make 4 stable covalent bonds.  The properties of atoms are determined by their outermost electrons (valance electrons): He – has 2 valance electron O – has 6 valance electrons C – has 4 valance electrons  Octet Rule: a rule which states that elements combine to give the same electron configuration as noble gases to achieve stability. Atoms can achieve this through bonding.  Two types of bonds: 1) Ionic Bond – this type of bonding is formed from the transfer of electrons between atoms, which results in ions. Atoms will either lose or gain electrons (resulting in cations and anions), which are then attracted to each other. - Examples: Li+ F- 2) Covalent Bonds (most important for organic chemistry) – this type of bond forms between atoms with similar electronegativities. The atoms will share their electrons, which results in a decrease in energy. This leads to stability. There are two types of covalent bonds: 1) Polar covalent bond and 2) Non-polar covalent bond.  Electronegativity – measure of an atom's attraction to electrons or the tendency for an atom to pull electron density towards itself.  How to determine the bond type (ionic vs. covalent) The differences in the electronegativities between atoms will help determine the typ

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