Defining
Define reactant.
Ingredient; what is used in a chemical rxn
What does the arrow --> mean in a chemical reaction?
Yields; produces
2Na + Cl2 -> 2NaCl is an example of which type of reaction?
Synthesis
Balance:
H2O -> H2 + O2
2H2O -> 2H2 + O2
Complete and balance this synthesis reaction:
K + Cl2 ->
2K + Cl2 -> 2KCl
Define the law of conservation of mass.
Matter cannot be created or destroyed – it only changes form.
Identify the reactants in the following reaction:
2AlBr3 + 3MgCl2 -> 2AlCl3 + 3MgBr2
AlBr3 and MgCl2
The general equation A + BC -> B + AC represents which type of equation?
Single Replacement
Balance:
Pb(OH)2 + HCl -> H2O + PbCl2
Pb(OH)2 + 2HCl -> 2H2O + PbCl2
Complete and balance this decomposition reaction:
AgBr ->
2AgBr > 2Ag + Br2
Define chemical reaction.
Process by which substances collide with enough energy that new bonds are formed, thus creating new substances.
Write how gaseous nitrogen trihydride would look in a chemical equation.
NH3 (g)
The process of digestion, or the breakdown of the food you eat, is most likely which type of reaction?
Decomposition
Balance:
P + O2 -> P2O5
4P + 5O2 -> 2P2O5
Complete and balance the following single reaction:
LiI + Cl2 -> LiCl + I2
2LiI + Cl2 -> 2LiCl + I2
Define aqueous.
Dissolved in water
Write the chemical equation for the following reaction:
Iron (III) chloride reacts with magnesium hydroxide to produce iron (III) hydroxide and magnesium chloride.
FeCl3 + Mg(OH)2 -> Fe(OH)3 + MgCl2
AgNO3 + NaCl -> AgCl + NaNO3 is an example of which type of reaction?
Double
Balance:
C3H8 + O2 -> CO2 + H2O
C3H8 + 5O2 -> 3CO2 + 4H2O
Complete and balance the following combustion reaction:
CH4 + O2 ->
CH4 + 2O2 -> CO2 + 2H2O
Define precipitate.
An insoluble solid that often suddenly appears as a product when two aqueous ionic compounds react.
Write the chemical equation for the following reaction:
Solid sodium reacts with liquid water to produce aqueous sodium hydroxide and hydrogen gas.
Na(s) + H2O(l) -> NaOH(aq) + H2(g)
This type of reaction can result in the formation of a precipitate.
Double
Balance:
Na2O + CO2 + H2O -> NaHCO3
Na2O + 2CO2 + H2O -> 2NaHCO3
Complete and balance this double replacement reaction:
Al(OH)3 + Mg3(PO4)2 ->
2Al(OH)3 + Mg3(PO4)2 -> 2AlPO4 + 3Mg(OH)2