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7 Cards in this Set
- Front
- Back
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formula to determine concentration when given moles and volume? |
c = n/v volume is given in L's |
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what is the unit used for concentration? |
mol L^-1 |
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why is the concentration the same for each of the species of a compound when given moles and volume? |
Because it has the same number of moles and volume, it is equal to each other |
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what is important about net ionic equations? |
Tells you the chemical change in each of the species within the reaction and can seperate the ions that are involved in the formation of a product and ions that do not change throughout the rection (spectator ions) This is important when a precipitate is formed as you can identify which of the ions were involved in forming the precipitate
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How do you write a net ionic equation? |
1. you seperate all the species in each of the compound to its monoatomic ion and include its charge and state. Although all ions are seperated, the ions that make up the precipiate, which are formed in the products are not written seperately. |
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What is a redox reaction? Define oxidation and reduction |
A redox reaction is a reaction that involves the transfer of electrons. Oxidation is when a species looses an electron and reduction is when a species gains an electron. The oxidised species is the reducing agent, and the reduced species is the oxidising agent. |
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What are the rules in determining oxidation numbers? |
element by itself: always 0 Group 1: always +1 Group 2: always +2 Halogens: usually -1 but (+) with oxygen Oxygen: usually -2 but -1 with H2O2 (peroxide) Hydrogen: +1 with nonmetals and -1 with metals Flourine: always -1 sum of O.N in monoatomic ion = the ionic charge sum O.N in polyatomic ionic compound: the ion charge |
