chemistry Flashcards
what is a chemical reaction
when a new suubstance is formed;
change of colour
gas given off
a new solid forms
energy change
what does the reaction rate mean
describes the speed of a reaction,the faster the reaction, the higher the rate
calculte the rate of a reaction if 10cm3 of gas is produced in 20 secs
rate=qauntity divided by time
rate=10 divided by 20=0.5cm3/s
whats concentration
the concentration of a solution describes the amount of solute dissolved
what is a catayst
is a substance that speeds up a chemical reaction without being used up
in what way does a catalyst work
it reduces the energy requirments for the reaction making it faster and cheaperfor chemica industries
what are enxymes made of
made from protein chains that are folded to form pockets called active sites
what do enzymes do
enzymes usually break substances down or build them up
what is denaturation
is caused by increasing/decreasing ph or temperature which causes the enzyme loose its shape which leads to the substance being unable to bind
