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Chapter 11
Stoichiometry: Calculations Based on Chemical Equations

11-01

Labeled

Title
Road map to stoichiometric conversions
Caption
A road map to stoichiometric conversions. The diagram shows a "grams of A" to "grams of B" conversion sequence. Conversion factors are show alongside the arrows.
Keywords
stoichiometry, conversions, mole, mass, chemical reaction, road map
11-01-01UN

Labeled

Title
Conversion of "grams A" to "grams B"
Caption
Diagram illustrating a "grams A" to "moles A" to "moles B" to "grams B" conversion sequence. The conversion factors are shown alongside the arrows.
Keywords
stoichiometry, conversions, mole, mass,
11-02

Labeled

Title
Road map of stoichiometric conversions with molar concentrations
Caption
Stoichiometric conversions involving molar concentrations. The diagram shows the sequence of conversions needed for stoichiometric calculations when the one or both of the reacting chemicals is dissolved in water. Conversion factors are shown alongisde the arrows.
Keywords
stoichiometry, conversions, mole, mass, molarity, solution, chemical reaction, road map
11-04

Labeled

Title
Limiting reactant
Caption
When you make sandwiches from bread, lunchmeat, and cheese, whichever one you run out of limits the number of sandwiches you can make - like the "limiting reactant" which controls the amount of products that can be formed during a chemical reaction. In this figure, bread is the "limiting reactant."
Keywords
limiting reactant, limiting reagent, stoiciometry
11-05

Labeled

Title
Limiting reactant in the formation of ammonia
Caption
When ammonia is formed from a mixture of 1 N2 and 6 H2 molecules, all of the nitrogen is consumed when two molecules of ammonia are produced. The proportions are the same if we use moles. The amount of nitrogen limits the amount of ammonia that can be formed. Nitrogen is the limiting reactant. Hydrogen is present in excess.
Keywords
limiting reactant, nitrogen, hydrogen, ammonia, excess
11-06

Labeled

Title
Energy level diagram for an exothermic reaction
Caption
The exothermic reaction of hydrogen gas with oxygen gas. The combustion of hydrogen is an exothermic reaction: )H=-283 kJ. The energy possessed by the product, water, is less than the energy of the reactants, so )H is negative.
Keywords
enthalpy, exothermic, energy level, combustion, oxygen gas, hydrogen gas, heat change
11-07

Labeled

Title
Energy level diagram for endothermic reaction
Caption
The decomposition of water is an endothermic reaction: )H=+283 kJ. The energy possessed by the products is greater than the energy of the reactants, so )H is positive. When a direct current is used to supply the energy, the process is called electrolysis.
Keywords
enthalpy, endothermic, endergonic, energy level, decomposition, electrolysis, water, hydrogen oxygen, heat change

Labeled

Title
Limiting Reagent
Caption
Keywords

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