chemical industry Flashcards
define the rate of reaction
the change in concentration of a reactant or product at a given time
what are the units for rate?
moldm^-3 s^-1
what is k?
rate constant
What is the rate equation?
rate = k(A)^a(B)^b
what is the pattern in half lives for a zero order reaction?
half life decreases
what is the pattern in half lives for a fisrt order reaction?
constant half life
what is the pattern in half lives for a second order reaction?
half life increases
what is the equation for k?
k=ln2/t(1/2)
what is the effect of temperture on the equilibrium constant?
it changes it
what is the effect of pressure on the equilibrium constant
nothing
what is the effect of adding a catalyst on the equilibrium constant?
nothing
what is N2O?
dinitrogen monoxide / nitrous oxide / nitrogen(i)oxide
what is NO
nitrogen monoxide / nitric oxide / nitrogen(ii) oxide
what is NO2?
nitrogen dioxide / nitrogen(iv) oxide
what is the appearance of N2O
colourless gas, sweet smell - laughing gas
what is the appearance of NO?`
colourless gas
what is the appearance of NO2?
brown gas, sharp odour, toxic
what is the test for NO3- nitrate(v)
warm with NaOH and Devardas alloy
reduces to ammonia gas
red litmus paper blue
what is the test for ammonium?
warm with NaOH
makes ammonia gas
red litmus paper blue
