chemistry - s2 Flashcards
does temperature change the rate of reaction
low temperature - low energy
high temperature - high energy
does concentration have a effect on the rate
few - slow
lots - fast
how do you measure the rate of a reaction
looking at how a measurable quantity changes over time
4 signs of a chemical reaction
colour change
energy change
precipitate
bubbling
what is a catalyst
a special substance called a catalysts can be used to increase the speed of a reaction
the catalyst itself remains unchanged
hydrogen peroxide
water + oxygen
carbonic acid
fizzy drinks
tannic acid
tea, coffee, red wine
asboric acid
vitamin c
ethanoic acid
vinegar
citric acid
lemon
PH scale
PH scale goes from 0 to 14, 0 the most acidic and 14 the is the most basic
collision theory
fore a reaction to happen the molecules must collide and they must have energy for the collision to work
common acids
hydrochloric acid
sulfuric acid
nitric acid
common alkalis
sodium hydroxide
potassium hydroxide