science- chemical reactions, yr7
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all key terms and definitions from the year 7 topic chemical reactions
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27 Terms
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
Note 
Flashcards (92)