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More types of Reactions
Terms in this set (27)
loss of electrons
gain of electrons
a reaction that involves the transfer of electrons between reactants
hypothetical numbers that keep track of electrons an atom has throughout a reaction
(represents the number of electrons that an atom can gain, lose, or share when chemically bonding with an atom of another element)
oxidation numbers are always reported for one individual atom or ion and not for
groups of atoms or ions.
Review oxidation rules
What is oxidized and reduced?
Mg + CuSO4 MgSO4 + Cu
Mg + CuSO4 MgSO4 + Cu
2K + Br2 2KBr
Cu + 2AgNO3 Cu(NO3)2 + 2Ag
how do you know if it is redox?
must have atoms changing in
charge (oxidation number).
elements entering and leaving compounds
is it redox?
1. 2H2 + O2 2H2O
2. Zn + CuCl2 ZnCl2 + Cu
3. AgNO3 + LiCl AgCl + LiNO3
displacement reactions (AKA single replacement reactions)
ions in solution oxidize an element.
A + BX → AX + B
Examples:Zn(s) + HBr(aq) → ZnBr2(aq) + H2(g)
Mn(s) + Pb(NO3)2(aq) → Mn(NO3)2(aq)+ Pb(s)
elements higher on the activity series are more reactive (more easily oxidized).
Redox Reactions are composed of two parts called
2Na + F2 2NaF
oxidation: 2Na -> 2Na+1 + 2e-
reduction: F2 + 2e- 2F-1
Zn + CuCl2 -> ZnCl2 + Cu
Ox: Zn -> Zn+2 + 2e-
Red: Cu+2 + 2e- -> Cu
the amount of solute dissolved in the solvent
the number of moles of solute per liter of solution
Which is more concentrated, a solution prepared by dissolving 21.0 g of NaF in enough water to make 500 mL of solution or a solution prepared by dissolving 10.5 g of NaF in enough water to make 100 mL of solution?
10.5 g NaF of 100 mL
M1 × V1 = M2 × V2,
where M1 and M2 are the molarity of the concentrated and dilute solutions, respectively, and V1 and V2 are the volumes of the two solutions.
How many milliliters of 3.0 M H2SO4 are needed to make 450 mL of 0.10 M H2SO4?
How many grams of Ca(OH)2 are needed to neutralize 25.0 mL of 0.100 M HNO3?
0.0096 g Cu(OH)2
How many grams of NaOH are needed to neutralize 20.0 mL of 0.150 M H2SO4 solution?
0.210 M NaOH
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