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

TRIPLE Energy

TRIPLE AQA Chapter 7 Energy Batteries and fuel cells

QuestionAnswer
Describe the procedure to make a chemical cell Dip 2 different metals in a beaker of Sodium Chloride; connect the metals to a high resistance voltmeter
What is the relationship between the difference of reactivity between two metals and the voltage? The bigger the difference of reactivity, the higher the voltage
In a chemical cell, which metal gets reduced (gains electrons): the most reactive or the least reactive? Least reactive
In a chemical cell, which metal gets oxidised (loses electrons): the most reactive or the least reactive? Most reactive
In a chemical cell, Magnesium is the most reactive metal. Write the equation for the reaction on the Magnesium Mg will lose electrons: Mg --> Mg+2 + 2e-
In a chemical cell, Copper is the least reactive metal. Write the equation for the reaction on the Copper Copper (ions) will gain e-: Cu+2 + 2e- --> Cu
Why do batteries go flat? One of the chemical runs out
Is the following equation a reduction or an oxidation? Zn --> Zn+2 + 2e- Electrons are on the right of the arrow, it is a loss of e-, OILRIG, oxidation
Is the following equation a reduction or an oxidation? Ag+ + 1e- --> Ag Electrons are on the left of the arrow, it is a gain of e-, OILRIG, reduction
CHALLENGE: write the OVERALL equation for the reaction using the following two HALF-equations: Ag+ + e- --> Ag and Zn -->Zn+2 + 2e- 1) must have same number of electrons for both half-equations so 2Ag+ + 2e- --> 2Ag; 2) add the chemicals on left of the equation for both equations (2Ag+ + 2e- + Zn) 3) add chemicals on right (2Ag + Zn+2 + 2e-) 4) simplify 2Ag+ + Zn --> 2Ag + Zn+2
CHALLENGE: write the OVERALL equation for the reaction using the following two HALF-equations: Al+3 + 3e- --> Al and 2O2- -->O2 + 4e- 1) must have same number of electrons for both half-equations so 4Al+3 + 12e- --> 4Al and 6O2- --> 3O2 + 12e- ; 2) add the chemicals on left of the equation for both equations; add chemicals on right 3) simplify 4Al+3 + 6O2- --> 4 Al + 3O2
Why are some batteries rechargeable and some others (alkaline batteries) NOT rechargeable? Because the for some reactions, the overall equation is not reversible
How would you make a 6V battery using 1.5V chemical cells? Add the cells in series: that means connect the (+) terminal of one cell to the (-) cell of the next one along
In a chemical cell, which metal is the negative terminal: the most reactive or the least reactive? The most reactive
In a chemical cell, which metal is the positive terminal: the most reactive or the least reactive? The least reactive
What is the OVERALL equation for the reaction taking place in a Hydrogen fuel cell? 2H2 + O2 --> 2 H2O
What is the HALF-equation for the reaction for the Hydrogen gas taking place in a Hydrogen fuel cell? 2 H2 + 4 OH- --> 4 H2O + 4e-
What is the HALF-equation for the reaction for the Oxygen gas taking place in a Hydrogen fuel cell? O2 + 2 H2O + 4e- --> 4 OH-
What are the advantages of using a Hydrogen fuel cell? 1) No pollutant made, simply water; 2) do not need to be recharged; 3) can be a range of sizes for different uses
What are the disadvantages of using a Hydrogen fuel cell? 1) hydrogen is flammable 2) hydrogen must be stored under great pressure and/or at low temperature 3) hydrogen is produced using fossil fuels (ie it is not renewable)
When making a chemical cell using 2 different metals and a beaker of sodium chloride, what should you keep the same to make it a fair test? surface area of the metal sticks; volume and concentration of the sodium chloride solution, temperature (very much like the rate of reactions...)
Created by: ursulinechem2
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