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16 Cards in this Set
- Front
- Back
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Physical Properties of Metals
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Malleable- Moulded into different shapes
Durable Conduct Electricity- Conduct Heat- High density- high Opaque- impervious to light Lustrous- bright and polished Ductile- could be drawn into wires Solid at room temp Sonorous- makes a definite sound |
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Physical Properties of Metals Which are Bad
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Rusting- Could break
Dense- Will always sink Magnetic |
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Methods of Preventing Rust
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Painting- impermeable to air and rain (cheap but could chip and deteriorate)
Electroplating- you use electrolysis to form a layer of metal over the first piece. You could gold plate things because it lasts for a long time. Alloy- A substance that is a mixture of two or more metals Wax or Grease- Wax, Oil, Grease, or lubricant is used for moving parts because it doesn’t stick like paint. Sacrificial Protection- You put a thin layer of a more reacting metal around the metal you want to protect. |
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Rusting requires both
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Oxygen and Water
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Accelerate Rusting using either
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Salt or Acid
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(OIL RIG)
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Oxidation is Lost, Reduction is gained- for electrons
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The term that describes when oxidation and reduction happen at once
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Redox
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Group One are:
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Alkali Metals
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Group 2 are:
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Alkaline Earth Metals
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How to test which metals react more
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1. Place three oxides in a vacuum
2. Introduce the metals to oxygen 3. The one that can reacts to oxygen is the most reactive 4. Introduce the others to water 5. The one that reacts to water is the second most reactive 6. Introduce the rest to diluted HCl 7. None reacted 8. Introduce to concentrated HCl |
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A Displacement Reaction is when
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A more reactive metal will displace a less reactive metal from a solution.
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1st step.
6 C + 3 O2 → 6 CO |
The coke (pure carbon) reacts with oxygen in the air blast to produce carbon monoxide
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2nd step
6 CO + 2 Fe2O3 → 4 Fe + 6 CO2 |
The carbon monoxide reduces the iron ore to molten iron, becoming carbon dioxide in the process
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3rd Step
CaCO3 → CaO + CO2 |
In the heat of the furnace the limestone flux decomposes to calcium oxide:
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4th Step
CaO + SiO2 → CaSiO3 |
calcium oxide combines with silicon dioxide to form slag.
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slag is called
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Calcium Silicate
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