1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ycow [4]
3 years ago
8

Which reaction occurs at the cathode of a lead-storage battery that is being recharged?

Chemistry
1 answer:
Alekssandra [29.7K]3 years ago
4 0
Reaction on positive electrode (cathode):
PbSO₄₍s₎ + 2H₂O₍l₎ → 2e⁻ + PbO₂₍s₎ + 4H⁺₍aq₎ + SO₄²⁻₍aq₎.
s - solid.
l - liquid.
aq - dissolve in water.
PbSO4 is converted to Pb at one electrode (anode) and to PbO₂ at the other (cathode). Lead battery can be recharged, during recharging, an external source of energy is used.
You might be interested in
I just don’t know what to do
ValentinkaMS [17]

Answer:

I dont know if this is correct.. but maybe in the tool row, put graduated cylinder because you use graduated cylinders to measure water and for units put milliliters or liters?? Sorry if this isnt correct i wouldnt know what else to put !

Explanation:

3 0
2 years ago
What is the sequence in the formation of the Earth and the Universe?
Bezzdna [24]

Answer:

The Earth formed billions of years after the Universe formed

Explanation:

The "universe" is said to have been formed <em>billions of year ago</em> through an explosion. This was called the <em>"Big Bang Theory." </em>This lead to the<u> expansion of the universe</u> owing to its high temperature and density. After which, the universe cooled down. Galaxies and stars were then formed. Some of the stars died due to explosion, which then led to the <u>creation of planets</u>. Such formation of the planets happened around <u>4.5 billion years ago.</u> This is <em>9.3 billions of years later</em> than the universe was formed<em> (13.8 billions of years ago)</em>. So, this explains the answer.

3 0
2 years ago
For the reaction CO+2H2=CH3OH at 700 K, equilibrium concentrations are [H2]=0.072 M, [CO]= 0.020M, and [CH3OH]= 0.030 M. Calcula
NikAS [45]

The balanced equation for the reaction is

CO(g) + 2H₂(g) ⇄ CH₃OH(g)

 

The given concentrations are at equilibrium state. Hence we can use them directly in calculation with the expression for the equilibrium constant, k. expression for k can be written as

   k = [CH₃OH(g)] / [CO(g)] [H₂<span>(g) ]²

</span>[H₂<span>]=0.072 M
[CO]= 0.020M
[CH</span>₃OH]= 0.030 M

 

From substitution,

   k = 0.030 M / 0.020 M x (0.072 M)²

   k = 289.35 M⁻²

<span>
Hence, equilibrium constant for the given reaction at 700 K is 289.35 M</span>⁻².

<span> </span>

3 0
3 years ago
How liquid in a thermometer changes so that it can be used to measure temperature
Afina-wow [57]

Most liquids expand when they are heated and contract when they are cooled.

A thermometer consists of a bulb of liquid connected to a thin capillary tube.

When the liquid is heated, it expands and moves up the capillary column. When the liquid cools, it contracts and moves back down the column.

You can determine the temperature by reading the position of the liquid against a graduated temperature scale.

3 0
2 years ago
Read 2 more answers
Determine the number of representative particles in the following: 0.35 mol zinc
Firdavs [7]

Answer:

36.4

Explanation:

8 0
3 years ago
Other questions:
  • What is the weight of a 90kg man standing on the moon, where gmoon = 1.64 m/s2?
    7·1 answer
  • MODomy
    15·1 answer
  • Name for continents in one landmass surrounded by gigantic ocean
    5·1 answer
  • How many grams of Cl2 are in 1.20 x 1024 Cl atoms?
    7·1 answer
  • How do you get bic grip permanent off of your hands?
    7·2 answers
  • How would you describe (explain the differences) solids, liquids, and gases to a 4th grader? Be clear please.
    9·2 answers
  • Compound A has a partition coefficient (K) of 7 when comparing its solubility in CH2Cl2 to water ( K=11, [solubility of A in g/m
    10·1 answer
  • An atom contains 8 protons, 8 neutrons and 10 electrons. A second atom
    7·1 answer
  • Why is it so important to use more than just fossil fuels for our energy sources?​
    7·1 answer
  • Help Pls thnk you !!!!!!!!!!!!!!!!!!!!!!!!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!