chemistry - s2

Question 1

does temperature change the rate of reaction

Answer 1

low temperature - low energy
high temperature - high energy

Question 1

does concentration have a effect on the rate

Answer 1

few - slow
lots - fast

Question 2

how do you measure the rate of a reaction

Answer 2

looking at how a measurable quantity changes over time

Question 3

4 signs of a chemical reaction

Answer 3

colour change
energy change
precipitate
bubbling

Question 4

what is a catalyst

Answer 4

a special substance called a catalysts can be used to increase the speed of a reaction

the catalyst itself remains unchanged

Question 5

hydrogen peroxide

Answer 5

water + oxygen

Question 6

carbonic acid

Answer 6

fizzy drinks

Question 7

tannic acid

Answer 7

tea, coffee, red wine

Question 8

asboric acid

Answer 8

vitamin c

Question 9

ethanoic acid

Answer 9

vinegar

Question 10

citric acid

Answer 10

lemon

Question 11

PH scale

Answer 11

PH scale goes from 0 to 14, 0 the most acidic and 14 the is the most basic

Question 12

collision theory

Answer 12

fore a reaction to happen the molecules must collide and they must have energy for the collision to work

Question 13

common acids

Answer 13

hydrochloric acid
sulfuric acid
nitric acid

Question 14

common alkalis

Answer 14

sodium hydroxide
potassium hydroxide

Question 15

bases

Answer 15

a base is a substance that can neutralize and react with a acid

Question 16

names of bases

Answer 16

metal oxides
metal hydroxides
metal carbonates