Unit 2, topic 1 REACTIVITY SERIES Flashcards
(23 cards)
Why are sword made of iron and/or steel found in poorer condition than weapons made of bronze?
Iron and steel rust.
What metal was known to ancient civilisations and why?
Gold, because it is very unreactive and so could be found occurring naturally in the ground.
Why is aluminium one of the most recent metals to be discovered even though it is one of the most abundant in the earth’s crust?
It requires electricity to separate it from its ore (which was only recently discovered).
The reactivity series is established by looking at metals’ reactions with what (3):
1) Oxygen
2) water
3) Acid
Why are potassium and sodium stored under oil?
They react readily with oxygen in the air.
Why does aluminium sometimes appear to be less reactive?
It forms a protective layer of aluminium oxide.
Metal + Oxygen =
Metal oxide
Metal + cold water =
Metal hydroxide + hydrogen
Metal + acid =
salt + hydrogen
Write down the reactivity series.
Potassium Sodium Calcium Magnesium Aluminium Zinc Iron Copper Protein Shakes Can Make A Zebra Incredibly Cool
Write a balanced equation for the reaction of sodium with air.
2 Na + O2 = Na 2 O
When strontium reacts with water, an alkaline solution is formed and a gas is given off. Name 1) the alkaline solution and 2) name the gas produced.
1)
2) Hydrogen
Give two observations you would make if a reaction was occurring.
1)
2)
Explain why magnesium metal does not occur uncombined in nature but copper metal does.
?
Describe group 1 metals (3):
1) soft metals
2) easy to cut with a knife
3) shiny surface which quickly tarnishes in air
On heating sodium, it burns with what colour of a flame?
Yellow
What is unusual about the oxide produced when zinc is heated in air?
It glows yellow but turns white on cooling
Why does a powdered metal burn on heating whereas sheets ofthe metal do not burn easily?
Powdered metal has a greater surface area with more oxygen which causes a more rapid reaction.
Strontium (Sr) is a typical group 2 element. Would you expect strontium to react more or less vigorously than calcium when out in water? Give reason for your answer.
I expect Sr to react more vigorously than calcium as it is one place below calcium in Group 2 and, as metals go down group 2, they become more reactive due to the nucleus’ attraction.
What formula would you expect for the oxide formed when strontium reacts with oxygen?
SrO
Give the formula of magnesium nitride
Mg3 N2
1) What can you observe when magnesium metal reacts with diluted hydrochloric acid?
2) Write an balanced equation for the reaction.
1) The magnesium produces bubbles and heat.
2) 2 Mg + 2HCl = ???
Name on other metal which reacts safely with diluted hydrochloric acid.
Zinc
