1.

Explainthe factorsinflucencingthe rateof areaction

Answer»

Solution :Importantfactorsthataffectrateof a reactionarefollows :
(ii )The reactionof sodiumwithhydrochloricacidis fasterthanwith aceticacid.
(iii )Hydrochloricacidis strongerthan aceticacidand morereactive. sothenatureof THEREACTANTS influencereaction rate .
`2Na_((s))+2HCl_((AQ)) toH_(2(g))` Fast
`2Na_((s))+2CH_(3)COOH_((aq)) to2 CH_(3)COONa_((aq))+ H_(2(g))("slow")`
Concentrationof thereactants:
changingtheamountof thereactantsalsoincreases thereactionrate. Theamountof the substance presentin acertainvolumeof thesolutionis called'concentration '.Morethe concentration, moreparticlesreaction , Granulatedzincreactsfasterwith2M hydrochloricacidthan1Mhydrochloricacid .
Temperature:
Increaseintemperatureprovidesenergytobreakmorebondsandthusspeedup thereaction, E.g`CaCO^3`reacts slowlywithup thereact slowlywith HCIat roomtemperature. WHenthe reactionmixutreisheatedthe reactionrateincreases.
PRessure :
(i)ifthereactantsare gases ,increasingtheirpressure, increasesthereactionrate .
sinceonincreasingpressurethe reactingparticlescomecloserandcollidefrequently .
Catalyst:
(i)A catalystincreasereactionratewithoutbeingconsumed in thereaction.
(ii )in certainreactions , adding a substanceascatalystspeedsup thereaction.
Surface areaof thereactants :
Powdering of thereactants, increasingthesurfaceareaand moreenergyis availableon collisionof reactant particles, thusthereaction rateis increased.


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