Calcium carbonate is heated to give off carbon dioxide and it becomes calcium oxide. A few drops of water is added and it turns into solid calcium hydroxide. Filtering it and adding more droplets will turn it into a calcium hydroxide solution.
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How is cement made?
Crushed Limestone and clay powder is mixed. Added to 1450 degree rotating kiln and a little calcium sulfate is added.
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Why is concrete used?
It can withstand compression, form structures of many different shapes and is very strong when reinforcing steel.
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What is the pattern in thermal decomposition?
Low reactivity = small amounts of energy. High reactivity = lots of energy. Extreme reactivity = bunsen burners are not enough
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List the properties of transition metals.
Good energy conductors, shiny surface when cut and malleable with cracking.
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What problems does impure iron face?
It is weak, brittle, not useful and not as valuable.
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What is an alloy?
A metal that is mixed in with other elements.
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Why dooes stainless steel not go rusty?
Because it is an alloy of steel and chromium.
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What is electrolysis?
When two electrodes (negative and pure, impure and positive) are placed in water for extraction.The movement of copper ions to the negative electrode to obtain more pure copper, the waste is at the bottom of the flask.
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What is phytoming?
When plants are planted to absorb copper compounds in the earth and burned. The ash is rich in copper compounds.
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What is bioleaching?
A slow process in which copper is extracted from a solution desposited from bacteria that obtain nutrients from copper ores.
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What is the fractional distillation process? (Part 1)
Heat the crude oil to 450 degrees. The compounds evaporate and become gases. They enter at the bottom of the fractioning column. Compounds with lower boiling points condense and leave as liquids.
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What is the fractional distillation process? (Part 2)
Lower boing point compunds condense higher up the chamber and leave as liquids. Those with the lowest boiling points condense at the top and leave as gases.
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What are the impacts of acid rain?
Lakes become more acidic, damages limestone buildings, soil nutrients is dissolved so tree roots cannot absorb them and the waxy coating of leaves is damaged.
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Why is plant oil useful?
When it burns large amounts of energy is transferred and it is not as environmentally damaging as fossil fuels.
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Other cards in this set
Card 2
Front
How is cement made?
Back
Crushed Limestone and clay powder is mixed. Added to 1450 degree rotating kiln and a little calcium sulfate is added.
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