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Cards In This Set
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Cement is made by....
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Limestone and clay (powdered)
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Concrete is made by...
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Cement, water, sand and crushed rock.
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Carbonates react with acids to form...
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A salt, water and carbon dioxide.
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A test for the presence of carbon dioxide is to...
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Bubble in limewater- it turns the solution cloudy
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Magnesium carbonate when heated makes...
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Magnesium oxide and carbon dioxide.
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The first two steps of the limestone cycle are...
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Calcium carbonate (limestone) is heated to make calcium oxide (quicklime) giving off CO2. Water is then added to create calcium hydroxide-slaked lime.
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The last two steps of the limestone cycle are...
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More water is added to the Calcium hydroxide to make Calcium hydroxide Sn. (limewater) and then CO2 is added to make limestone.
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Calcium hydroxide is a alkaline...
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So it can be used to neutralise acids.
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Three issues with limestone are that...
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The process of 'blasting' scares off wildlife & disturbs locals, cement making release CO2 (5% worldwide) and quarrying forms holes.
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Concrete is...
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The most widely used building material.
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Crude oils are...
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A mixture of hydrocarbons.
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Fractional distillation is...
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The process in which hydrocarbons are separated into fractions.
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The general formula for alkanes is...
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CnH2n+2
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Alkanes are saturated hydrocarbons because...
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They do not contain a double bond.
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Longer-chained hydrocarbons are...
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Less volatile, are more viscous, are less flammable and have a higher boiling point.
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