Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
How does electrochemistry create electrical energy
|
The chemical reaction is used to go through a current in a wire which generates electrical energy
|
|
|
To be oxidized means to gain or lose oxygens
|
Oxidized means to lose H and gain oxygens
|
|
|
The reducing agent loses or gains electrons
|
The reducing agent loses electrons
|
|
|
An Ox and the Red Cat are in reference to what
|
The anode is the electrode that gets oxidized and the cathode is the electrode that gets reduced
|
|
|
Where does the K+ and the NO3- go from the salt bridge
|
The cation will go to the CATHODE and the anion will go to the ANODE
|
|
|
What is the shorthand notation for Galvanic Cells
|
Anode/ anode ion // cathode ion / cathode
|
|
|
Are metals never - or +
|
metals are never -
|
|
|
What element did Chris say is always say is spontaneous
|
Cu 2+ 2e- ---- Cu(s)
|
|
|
The removal of the salt bridge in an galvanic cell will allow the galvanic cell to have the cathode become negative and the anode to become positive, this is similar to what in physics
|
A capacitor because it stores energy due to the separation of charge on adj. surfaces
|
|
|
Does the solid metal form at the cathode or the anode
|
The solid metal ALWAYS forms at the cathode
|
|
|
If a cell voltage is positive is the reaction spontaneous or non spontaneous
|
The reaction is spontaneous
|
|
|
Name the five ways to induce battery death
|
All the materials run out
Cut the salt bridge-creates capacitor(dies slowly) Cut the wire- the battery dies immeaditily Cold weather-solution becomes less viscous Hot weather- lose the solution (evaporation) |
|
|
The more negative the reduction potential, the weaker or stronger the reducing agent is
|
The stronger the reducing agent is
AND The more POSITVE the reduction potential, the stronger the oxidizing agent is |
|
|
If Zn 2+ + 2e- ---Zn has a standard potential of -.76V, is Zn a good oxidizing agent or a good reducing agent
|
The Zn is a good reducing agent because the reduction of Zn is non spontaneous so it wants to be oxidized making it a good reducing agent
|
|
|
What makes a good oxidizing agent
|
High + value
want to gain electron MnO4- Cr2O72- CrO3 |
|
|
What makes a good reducing agent
|
Good= (s) NaBH4, LiAlH4
|
|
|
How to tell if reaction is spontaneous is through the equation
|
Delta G= -nF Delta E
n is the measure of moles of electrons |
|
|
What are the two things to rememeber for electrolytic cells
|
Force reactions against their will
They need a power source Anode + and Cathode is - |
|
|
What is the equation that is relevant to physics in general chemistry
|
Current (Amp) * Time(Seconds) = n(moles of electrons) * Faraday's Law
|
