Chemical Changes Flashcards
Bronze
Alloy copper and tin
Brass
Alloy copper and zinc
Gold
Can be alloyed with silver, copper and zinc
Percentage purity gold
Carat number/24 x100
Steel
Alloy iron, carbon and other materials
High carbon steel
Strong but brittle
Low carbon steel
- softer, more maleable
- car body work
Stainless steel
Steel with chromium and nickel
- hard, restistant to corrosion
- cutlery
Aluminium alloy
Low density
Base
Any substance thatreacts with an acid to form salt and water only
Potassium reaction
With cold water
-fizzig and lilac flame
Sodium reaction
Reacts with sold water
-moves spins, melt into ball, dissolve
Lithium reaction
Reacts with cold water
-fizzes, dissolves into water
Calcium reaction
Reacts with cold water
-bubbles violently, white precipitat
Magnesium
Reacts hot water
-bubbles come of
Zinc
Reacts with acid
-fizzes, white precipitate
Iron reaction
Reacts with hot acid
-fizzes, white precipitate
Lead reaction
Doesnt react with acid and water
Metal + acid
Salt + hydrogen
Metal oxide + acid
Salt + water
Metal hydroxide + acid
Salt + water
Metal carbonate + acid
Salt + water + carbon dioxide
Hydrochloric acid salt name
Chloride
Sulphuric acid salt name
Sulphate
Nitric acid salt name
Nitrate
Phosphoric acid salt name
Phosphate
Ethanoic acid salt name
Ethanoate
Metals that react with acid to produce salt and hydrogen
Magnesium, zinc, iron. + hyrdochloric and sulphuric acid
Metal + water
Metal hydroxide + hydrogen (oxidation)
Thermite reaction
Mixture metal powder and metal oxide
Methyl orange
Red to yellow
Phenothalein
Colourless to pink
Red litmus paper
Red- acid and neutral
Blue-alkali
Blue litmus paper
Red- acid
Blue-alkali and neutral
Universal indicator
Acid- deep red to light green
Neutral- dark green
Alkali- dark blue to light blue/turquoise
