Balance this Equation:
_____ Al + _____ O2 → _____Al2O3
4, 3, 2
What is the oxidation number for elements in their elemental state?
What is the difference between Net Ionic and Total Ionic Equations
Net Ionic Equations do not include spectator ions. while total ionic equations do.
Are nitrates always soluble?
Yes
Calculate the number of grams of HCl that can react with 0.500 g of Al(OH)3.
Al(OH)3(s) + HCl(aq) → AlCl3(aq) + H2O(l)
.701 g HCl
What type of reaction is this?
4Fe + 3O2 -----> 2Fe2O3
Synthesis/Combination
What is the oxidation number for hydrogen and oxygen?
Hydrogen is +1
Oxygen is -2
What is a spectator ion?
An ion that does not participate in creating the precipitate
Is ammonium always soluble?
Yes
How many moles of O2 are needed to burn 1.25 mol of C8H18?
2 C8H18(l) + 25 O2(g) → 16 CO2(g) + 18 H2O(g)
15.6 mol O2
What is the equation for Percent Composition?
𝑃𝑎𝑟𝑡/𝑊ℎ𝑜𝑙𝑒 ×100%
OR
𝑒𝑙𝑒𝑚𝑒𝑛𝑡 𝑜𝑓 𝑖𝑛𝑡𝑒𝑟𝑒𝑠𝑡/𝑚𝑜𝑙𝑎𝑟 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑐𝑜𝑚𝑝𝑜𝑢𝑛𝑑 ×100%
Tell me what OIL RIG is and tell me what oxidizing agents and reducing agents are.
-Oxidation is losing electrons = charge becomes more positive
-Reduction is gaining electrons = charge becomes more negative
-Oxidizing agent is the one that goes through reduction
-Reducing agent is the one that goes through oxidation
What is the precipitate in this reaction?
2KCl (aq) + Pb(NO3)2 (aq) -> 2KNO3 (aq) + PbCl2 (s)
PbCl2(s)
Are hydroxides always soluble?
Hydroxides always insoluble EXCEPT with Group IA and NH4+, Ca, Sr, Ba
(Calculate the mass of calcium oxide that can be prepared from 4.20 g of solid calcium reacting with 2.80 g oxygen gas. )
Determine limiting reactant by finding how many moles of O2 are needed to react completely with the
moles of Ca that you have. (Use mole ratio of reactants.)
2 Ca(s) + O2(g) → 2 CaO(s)
Limiting: Ca
What type of reaction is this?
3C + 2Fe2O3 -----> 3CO2 + 2Fe
Single Replacement
What are the oxidation numbers for Sulfur and Oxygen?
S2O32-
S _____
O ____
S: +2
O: -2
What is the total ionic equation?
2KCl (aq) + Pb(NO3)2 (aq) -> 2KNO3 (aq) + PbCl2 (s)
2K+ (aq) + 2Cl- (aq) + Pb2+ (aq) + 2NO3– (aq) -> 2K+ (aq) + 2NO3 – (aq) + PbCl2 (s)
What is the weak base?
NH3
(Calculate the mass of calcium oxide that can be prepared from 4.20 g of solid calcium reacting with 2.80 g oxygen gas.)
Determine mass of CaO produced from the moles of limiting reactant that you have.
2 Ca(s) + O2(g) → 2 CaO(s)
5.88 g CaO
Balance this equation
_____ AgNO3 + _____ Ni → _____ Ni(NO3)2 + _____Ag
2,1,1,2
Determine which element is being oxidized and which element is being reduced in the following
reactions. Also balance the reaction.
___ NaClO3(s) ----> ____ NaCl(s) + ____ O2(g)
Coefficients: 2, 2, 3
Oxidized: O
Reduced: Cl
What is the Net Ionic Equation?
2KCl (aq) + Pb(NO3)2 (aq) -> 2KNO3 (aq) + PbCl2 (s)
2Cl- (aq) + Pb2+ (aq) -> PbCl2 (s)
Name all strong acids
1. HCl
2. HBr
3. HI
4. HNO3
5. HClO4
6. HClO3
7. H2SO4
Calculate the mass of calcium oxide that can be prepared from 4.20 g of solid calcium reacting with 2.80 g oxygen gas.
Determine the mass of excess reactant that will react with the limiting reactant. Subtract amount of
excess reactant that was used in the reaction from the amount that you have.
2 Ca(s) + O2(g) → 2 CaO(s)
1.12g O2 remains