science- chemical reactions, yr7

all key terms and definitions from the year 7 topic chemical reactions

what is this hazard symbol

flammable

what is this hazard symbol

explosive

what is this hazard symbol

toxic

what is this hazard symbol

harmful to environment

what is this hazard symbol

corrosive

what is this hazard symbol

irritant

what is this hazard symbol

hazard to health

what is this a diagram of?

solid

what is this a diagram of?

liquid

what is this a diagram of?

gas

physical change

the type of particle stays the same

chemical change

the type of particle changes

what do you use to measure the pH of something

universal indicator

on the pH scale, what colour is acid

red, 0-6

on the pH scale, what colour is alkali

purple, 8-14

on the pH scale, what colour is neutral

green, 7

neutralisation

a chemical reaction when acids and alkalis cancel the effects of each other out

acid+ alkali>

salt+ water

word equation

reactants> products

name 3 common laboratory strong acids

sulphuric acid, nitric acid, hudrochloric acid

metal + acid>

salt+ hydrogen

name 3 salts

magnesium sulphate, zinc chloride, iron nitrate

metal + hydrochloric acid>

metal chloride + hydrogen

metal + sulphuric acid>

metal sulphate + hydrogen

metal + nitric acid>

metal nitrate+ hyrdrogen

when metal carbonates react with dilute acids, they produce what 3 products?

carbon dioxide, a salt, water

acid+ carbonate>

salt+ carbon dioxide + water