chem 116 quiz 4 Flashcards
what three things are we determining affect chemical reaction rate in this lab
temperature, particle size, and concentration
in hot summers, our cell phone batteries typically last (shorter/longer) than in the winter because ?
longer; the chemical reactions inside the batteries occur faster and more efficiently
the Arrhenius equation
k = Ae^(-Ea/RT)
the frequency factor A in the Arrhenius equation describes
how often the possibilities open for the reaction
the activation energy Ea is
the barrier/transition state the starting materials need to conquer
the exponential factor in the Arrhenius equation describes
the fraction of molecules that have enough energy for the reaction
activation energy and the exponential factor can be determined experimentally using
Arrhenius plot
most collisions (do/do not) lead to reactions
do not
the Arrhenius plot is the plot of ? vs ?
ln(k) vs 1/T
the linear Arrhenius plot of ln(k) vs 1/T has a slope of ? and a y-intercept of ?
-Ea/R = slope A = y-intercept
the frequency factor A can be separated into two parts
orientation factor p and collision factor z
the reaction generates hydrogen gas which is
flammable/explosive
safety precautions
splash-proof goggles, long pants, closed-toe shoes
all used solutions may
go down the drain with lots of water
any undigested or excess magnesium should be
filtered out and put in the solid waste receptacle
