Why do metals gain mass when they react with oxygen
Because they form an oxide which is heavier than the pure metal
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What happens when Aluminium reacts with (heated) air
Burns only when finely powdered, forming a white solid
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What happens when Zinc reacts with (heated) air
Burns steadily, forming a yellow solid which becomes white on cooling
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What happens when Sodium reacts with (heated) air
Burns with a yellow/orange flame, forming a white solid
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Why is the curcible lid lifted during the experiment? ( reacting metals with air)
To allow more air into the crucible
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What is the colour of the flame observed when potassium is heated in air?
Lilac
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What is the colour of the product of the reaction of copper with oxygen?
black
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What are the saftey precautions taken when reacting metals with water?
Behind a saftey screen, tongs/tweezers are used to handle the metal, saftey googles are used
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State 3 observations when potassium reacts with water
Floats on the surface, Burns with a lilac flame, Heat is released
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State 3 observations when Na reacts with water
Floats on the surface, Melts and forms a silvery ball, Heat is released
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State 3 observations when calcium reacts with water
Bubbles of gas produced, Metal sinks and rises, Heat is released
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Describe how you would set up the apparatus to react calcium/Mg with water
The metal is put in water in a beaker and an inverted filter funnel is placed over the metal. A boiling tube filled with water is used to collect the hydrogen produced
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Observations when Mg reacts with steam
Heated ribbon burns with a bright white light and forms a white solid, heat is released
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Observations when Iron reacts with steam
Powdered form glows at red heat, forming a black solid
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Why would a piece of aluminium foil not react with air, water or steam?
It has a protective oxide layer on its surface
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What is observed when Mg reacts with Copper(II) Sulphate?
Blue solution turns colourless, red brown solid formed, heat released
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What is the spectator ion in this reaction: Magnesium + Copper(II)Sulphate--> Magnesium Sulphate +Copper
Sulphate
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Why would Zinc not displace magnesium?
Zinc is less reactive than Mg
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How are metals high in the reactivity series extracted?
By electrolysis
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How are metal low in the reactivity series extracted
By reduction with carbon monoxide/carbon
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Why is carbon included in the reactivity series of metals?
Because it can displace metals from their compound
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what is Phyto mining?
The use of plants to absorb metal compounds from soil as part of metal extraction
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Describe the process of Phytomining
Plants grow and absorb copper compounds from soil. Plants are harvested and burned to produce and ash rich in copper(II)compounds. Ash is reacted with an acid such as sulfuric to produce a solution of the copper(II)ions (leachate). Scrap iron is added to
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Describe 3 advantages of Phytomining
Less destructive than traditional mining methods, Less dust/noise pollution, Carbon dioxide is absorbed as the plants grow
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Describe 3 disadvantages of Phytomining
It is slower as plants have to grow, Less copper is extracted, More expensive than traditional methods
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Other cards in this set
Card 2
Front
Why do metals gain mass when they react with oxygen
Back
Because they form an oxide which is heavier than the pure metal
Card 3
Front
What happens when Aluminium reacts with (heated) air
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