Sci 3(3) Flashcards
With what purpose are net ionic equations written?
eliminate spectator ions
Who is credited with the law of definite poroportions?
Proust
What French chemist rejected Proust’s law of definite proportions?
Claude Louis Berthollet
What did Proust use for his experiments?
Water and copper carbonate
Whose law could be considered essential for stoichiometry?
Proust’s Law
What part of Dalton’s atomic theory was wrong?
Atoms cannot be broken down further
How is the equilibrium constant calculated?
product of equilibrium concentration of products over product of equilibrium concentration of reactants
What happens if the value of the equilibrium constant is greater than 1?
The reaction will work backwards (product will become reactants)
What substances are dropped from the equilibrium expression?
pure solids and pure liquids
What is Ka?
equilibrium constant for acids
What is Kb?
equilibrium constant for bases
What is Ksp?
equilibrium constant for precipitates
What is Kp?
equilibrium constant involving pressures of gases
When is Kc used?
reaction involving solutions and concentrations
What is the activity (equilibrium contstant) of a pure solid or liquid?
1
What does a smaller number mean for Ka or Kb?
the acid or base is weaker
Is silver chloride soluble or insoluble?
insoluble
What is kinetics?
the study of how fast reactions occur and what affects the rate of the reaction
What shows the effect of changing concentrations on the rate of reaction?
rate law
What is the best model for chemical reactions?
collision model
What does thermochemistry focus on?
heat transfe
System+Surroundings=?
Universe
What do endothermic reactions do?
absorb heat
What do exothermic reactions do?
release heat
Who is credited with the discovery of carbon dioxide?
Joseph Black
When did Joseph Black begin to focus his research on heat?
1750s
