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Zinc

lab5

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lab7

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89 68th and Zinc A key aspect of chemistry once a reaction is completed, is analysis. So far you have quantitatively analyzed your white colored compound from the reactant side based on your knowledge of how much iodine and zinc reacted. Now you will determine the amount of zinc from the product side. To do this you will perform a titration which is basically a reaction between a known quantified substance, Na2H2EDTA, and an unquantified substance in this case, the amount of zinc ion in your product, zinc iodide. Once you have mastered the technique of titration, you will be given an unknown zinc salt and asked to find out how much zinc ion is in this substance. By doing this activity you will see how one quantity can be logically deduced

lab3

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49 The Redox Arena Redox is a compressed way of writing reduction and oxidation. Reduction refers to an atom gaining electrons and oxidation involves an atom losing electrons. Together, this process is very telling, in that it points to a very important aspect of chemical change: the electrons. For a reaction to occur, new bonds must form between atoms. lt is the ability of electrons to be shared or transferred between atoms that cause new bonds to form. The electron, more so than the proton or neutron, is the active player in the arena of chemical change. 'u! pupr{ ol ^Jeuruns lo ^docolorld aIBU\l 'z pue I sued rol sernpecold ruEroElo ,(oll Jo ezuEluuns g lool peau lqel lsrll rno^ u! g-[ slool ,ura!^au ls!llcor.lc qe'I-ard v n n tr AJls!uaqc ouolsrauroc :sllPloo aqf

Bob Jones PPT Notes -- Chapter 9b

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Stoichiometry 1 Literally means ?to measure the elements? Answers questions like?How much is needed?? and ?How much is produced?? Stoichiometry Unit analysis 365 days 1 year 24 hrs 1 day 3600 sec. 1 hr 1 year How many seconds are in a year? = 31,536,000 sec. Unit analysis We use unit analysis in stoichiometric problems also. Grams-to-moles conversion factors are found in the periodic table. Unit analysis Mole-to-mole conversion factors are found in the coefficients of the equation. A mole-to-mole conversion changes moles of one substance to moles of another substance. ?Skeleton Equation?
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