rate of reactions Flashcards
acid + metal ➡️
salt and hydrogen
acid + alkali ➡️
salt and water
acid + metal carbonate ➡️
salt + carbon dioxide + water
what do catalysts do
they reduce the activation energy requirement
what do catalysts do in terms of collisions
create more frequent successful collisions in a given period of time
what is a reaction profile
a graph to show the difference between products and reactants
what happens in an exothermic reaction
the reaction becomes cold
what happens in an endothermic reaction
the reaction becomes hot
how does the surface area affect the rate of reaction
higher the sa the quicker the reaction eg marble chips + HCl ➡️ dust has highest sa so has the highest rate of reaction
how does concentration affect the rate of reaction
higher conc. ➡️ quicker reaction
eg HCl and magnesium
higher conc. of HCl so more successful collisions
how does temp affect the rate of reaction
higher temp ➡️ shorter the reaction time
eg disappearing cross
what are catalysts not
they are not used up in the reaction
