8.1 Chemical Equation Concepts
(In vocabulary terms) tell me the set up of a chemical equation.
Reactants -> Products
What are the two products of combustion?
CO2 and H2O
Coefficients also give me what kind of ratio?
Mole Ratio
The limiting reagent is ..
the first reactant to be used up
Which group is known for being fairly unreactive and existing only as monatomics?
Group 18 | Noble Gases
What are the four states of matter?
(g) = gas
(s) = solid
(l) = liquid
(aq) = aqueous [dissolved in water]
Combustion relies on what outside component to cause the reaction?
Heat
6CO2 +6H2O --> C6H12O6 + 6O2
How many moles of carbon dioxide are needed to react with 3.25 mol of water in the reaction described above?
3.25 moles of CO2
Name the three kinds of yield and their relationship in a single equation
percent yield= actual yield/theoretical yield x 100%
What elements do not exist in elemental form in nature?
Group 17 | Halogens
What are the three kinds of reactions you learned about in this section?
Combination (A + B -> AB)
Decomposition (AB -> A + B)
Combustion (CxHyOz + O2 -> CO2 + H2O)
The unknown reactant in any combustion analysis can be put as...?
CxHyOz
CO2 + 2LiOH --> Li2CO3 + H2O
How many moles of lithium hydroxide are required to react with 20 mol of CO2?
What's the equation of Atom Economy?
ΣmM desired products/ ΣmM reactants x 100%
What part of the periodic table is known for violently reactive with water?
Group 1 | Alkali Metals
What is the process for balancing equations?
Trial and Error
Combustion Analysis is an experimental determination of what?
Determine the empirical formula
Hydrogen and oxygen gases react under a specific set of conditions to produce water. How many moles of oxygen would be required to produce 5.0 moles of water?
2.5 moles of O2
Mg + 2HCl --> MgCl2 + H2
What mass of hydrogen is produced from the reaction of 75 g HCl (MM=36.5 g/mol) and excess Mg?
2.0 grams of H2
What are the three coinage metals?
Silver (Ag), Gold (Au), and Copper (Cu)
Balance the following equation:
Al + H2SO4 -> Al2(SO4)3 + H2
2 Al + 3 H2SO4 -> Al2(SO4)3 + 3 H2
If I got molar ratios of: C= 1 | H= 2 | O= 1.2
What would my empirical formula be?
C5H10O6
Ammonia decomposes to produce nitrogen and hydrogen gases. How many moles of H2 can be formed by the decomposition of 0.145 moles of ammonia?
0.218 moles of H2
N2 + 3H2 --> 2NH3
In the reaction above, a student reacted 28 g of nitrogen with an excess of hydrogen. According to the students measurements, the reaction produced 30 g of product. The theoretical yield was 34 g. What is the student's percent yield?
88%
What are the two properties of elements that help us understand the types of reactions they undergo?
Ionization Energy and Electron Affinity