15-09-10 - -Pure water does not conduct electricity because...

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Wednesday, September 15 th , 2010 Starts from page 6 in Lecture 1. Page 156 textbook - Salt contains a heavy metal ions it will tend to be less soluble - If the salt has a high charged ions then it also will have less solubility - The strength depends on the size of the ions and the charge. Higher the charge less chance for water to dissociate the bonds to make it soluble. - 1. Slats of group 1 cation’s (except li) and NH4+ cation are soluble - 2. Nitrates acetates and perchlorates are soluble - Slats of silver lead and mercury are insoluble - Chlorides bromides and iodides are soluble - Carbonates phosphates sulphides oxides and hydroxides are insoluble - Sulphides of group 2 cations and hydroxides of CA, SR and ba are slightly soluble - Sulphates are soluble except for those of calcium, strontium, and barium - Salts with monovalent ions are generally soluble - Organic molecules have covalent bonds and the only way something can dissolve is that it must have ionic bonds
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Unformatted text preview: -Pure water does not conduct electricity because there are not enough ionic species for electricity to flow through. It is not an electrolyte.-Adding an electrolyte to water makes enough ions for electricity to pass through-Water is a good solvent for ionic compounds and for poplar covalent compounds(covalent molecules with polar bonds.) -If it contains an o-h bond it is said to have a polar covalent bond-If it has a strong intermolecular interactions you can dissolve in water-Water + ethanol = complete mixing-Water + sucrose = some mixing-Nacl = strong electrolyte-Sucrose = non-electrolyte -Both of these are very soluble in water why?-Sucrose has covalent bonds and when its dissolved in water the molecules remain intact and do not dissociate into ions. So it cannot be an electrolyte because electrolytes need ions. Redox reactions-Electron loss = oxidation-Electron gain = reduction-...
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This note was uploaded on 10/22/2010 for the course PHYSICS 1D03 taught by Professor N. mckay during the Spring '08 term at McMaster University.

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15-09-10 - -Pure water does not conduct electricity because...

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