reactivity Flashcards
Catalyst keywords
Provides an alternate reaction pathway that requires lower activation energy, giving more particles enough energy to overcome activation energy. Therefore, increasing the rate of reaction as more collisions are effective.
Increasing Temperature (particles)
Increases kinetic energy of particles, so that they have greater energy to overcome the activation energy and collisions are more likely to be successful. Particles gain speed and collide successfully more frequently. - Increases rate of reaction
Increasing Pressure
System will favour the reaction that provides the least moles of particles.
Increasing Volume
Decreases pressure and system will work to reverse, this and increase pressure, increasing number of present moles to increase the pressure. No change and equilibrium is maintained.
Increasing Temperature (reaction)
Favours endothermic reaction to absorb added energy as the system works to oppose the change.
Conjugate acid/base
An acid and its conjugate base differ by a proton. An amphiprotic atom can donate / receive a proton to become its conjugate pair
Weak ionising
Atoms only partially dissociate so less ions are produced and has a weak ionising ability
Strong ionising
Atoms only fully dissociate so more ions are produced and has a strong ionising ability
Conductivity
Conductivity is dependant on the number of free moving ions. This is dependant on the solutions ability to ionise.
Particles at beginning of reaction
Reactants at their highest amount, high frequency of successful collisions high rate of reaction
Particles as reaction proceeds
Reactants decrease as products are forming so fewer reactants are available to collide, fewer frequent collisions and lower rate of reaction.
High surface area
More particles are immediately available to collide as there is a larger surface area. Hence, more successful collisions and faster rate of reaction.
Low surface area
Fewer particles immediately available to collide, slower rate of reaction.
Does surface area affect number of products produced?
No. Same amount of reactants are used, so the same amount of products are produced.
What is K
A ratio of products to reactants.
