Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Unit 1

AQA unit 1 chemistry, gcse revision

QuestionAnswer
how is cement made? powdered limestone is heated in a kiln with powdered clay
what is limewater used for? as a test for carbon dioxide and it turns limewater cloudy as a result
element a substance only contains one type of atom
law of conservation no atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactions.
how is mortar made? cement + sand + water
how is concrete made? cement+ sand + aggregate
benefits of quarrying limestone jobs for locals useful material cheap material
drawbacks of quarrying limestone destoys habitat visual pollution creates noise heavy traffic
sulfur dioxide causes acid rain. mixes with clouds. forms dilute sulfuric acid. falls as acid rain-> causes lakes to become acidic= plants die, damages limestone buildings and statues.
properties of titanium low density metal. very strong. corrosion resistant
limestone cycle- eqations CaCO3->CaO+CO2->Ca(OH)2
limestone cycle- word equations calcium carbonate-> Carbon oxide-> solid calcium hydroxide -> calcium hydroxide solution
more volatile? turn into a gas at a lower temperature
Biodiesel: Pros Carbon neutral. engines arent converted. produces less sulfur dioxide than ordinary diesel/petrol
Biodiesel: Con can't make enough to completely replace petrol. expensive.
alernative fuels ethanol. biodiesel hydrogen gas
first four alkAnes methane CH4 Ethane C2H6 propane C3H8 Butane C4H10
Ethanol? Produced from plant material=biofuel. Made by fermentation of plants- carsoften mixed w/petrol=better fuel.
Alkanes are hydrocarbons that are saturated
ore? metal that contains metal worth extracting
bioleaching use of bacteria to extract metals from the ground
ductile? able to be drawn into thin wires
delocalised where electrons are free to move within structure, allows a charge to be carried
insoluble will not dissolve in water
soluble substance being dissolved
decompose break down into simpler compounds or elements
Cracking? Making a large hydrocarbon smaller (using heat and a catalyst.
CATALYST speeds up reaction, lowers activation energy, usually a transition metal
Created by: CBA
Popular Chemistry sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards