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
sleet_krkn [62]
3 years ago
9

onsider the reversible dissolution of lead(II) chloride. P b C l 2 ( s ) − ⇀ ↽ − P b 2 + ( a q ) + 2 C l − ( a q ) PbClX2(s)↽−−⇀

PbX2+(aq)+2ClX−(aq) Suppose you add 0.2393 g of P b C l 2 ( s ) PbClX2(s) to 50.0 mL of water. When the solution reaches equilibrium, you find that the concentration of P b 2 + ( a q ) PbX2+(aq) is 0.0159 M and the concentration of C l − ( a q ) ClX−(aq) is 0.0318 M. What is the value of the equilibrium constant, Kc, for the dissolution of P b C l 2 PbClX2?
Chemistry
1 answer:
Sveta_85 [38]3 years ago
5 0

Answer:

9.34x10^-4

Explanation:

Step 1:

The balanced equation for the reaction.

PbCl2( s ) <=> Pb^2+(aq) + 2Cl^−(aq)

Step 2:

Data obtained from the question:

Mass of PbCl2 = 0.2393 g

Volume = 50mL

concentration of Pb^2+, [Pb^2+] = 0.0159 M

Concentration of Cl^-, [Cl^-] = 0.0318 M

Equilibrium constant, Kc =?

Step 3:

Determination of the number of mole PbCl2.

The number of mole of PbCl2 can be obtained as follow:

Molar Mass of PbCl2 = 207 + (35.5x2) = 278g/mol

Mass of PbCl2 = 0.2393 g

Number of mole =Mass /Molar Mass

Number of mole of PbCl2 = 0.2393/278 = 8.61x10^-4 mole

Step 4:

Determination of Molarity of PbCl2.

At this stage we shall obtain the molarity of PbCl2. This is shown below:

Mole of PbCl2 = 8.61x10^-4 mole

Volume = 50mL = 50/1000 = 0.05L

Molarity of PbCl2 =?

Molarity = mole /Volume

Molarity of PbCl2 = 8.61x10^-4/0.05

Molarity of PbCl2 = 0.01722 M

Step 5:

Determination of the equilibrium constant Kc.

PbCl2( s ) <=> Pb^2+(aq) + 2Cl^−(aq)

The equilibrium constant Kc for the equation above is given by:

Kc = [Pb^2+] [Cl^-]^2 / [PbCl2]

[Pb^2+] = 0.0159 M

[Cl^-] = 0.0318 M

[PbCl2] = 0.01722 M

Kc =?

Kc = [Pb^2+] [Cl^-]^2 / [PbCl2]

Kc = 0.0159 x (0.0318)^2/ 0.01722

Kc = 9.34x10^-4

You might be interested in
Suppose you have made the following hypothesis:
Rudiy27
There are less sharks farther from coral reefs.
5 0
3 years ago
Read 2 more answers
How many atoms of each element are in NaCI?<br><br><br> |___| sodium <br><br> |___| chlorine
gogolik [260]

Answer:

There are 2 atoms in NaCl. This is because there is 1 atom of Na (sodium) and 1 atom of Cl (chlorine) in each NaCl molecule. Elements by themselves do not have a "number of atoms"- if you're talking about the atomic number, it's the number of protons (or electrons in a neutral atom) of an element.

7 0
2 years ago
Read 2 more answers
What will happen to the balloon and cloth if they are brought close together without touching? Explain.
fomenos
They will repeal(that is the correct answer to the question)<
5 0
3 years ago
How do you balance: Al+Fe3O4=Al2O3+Fe ?
liraira [26]

Answer:

8Al+3Fe3O4=4Al2O3+9Fe

3 0
2 years ago
Read 2 more answers
If a gas at a pressure of 600 mmHg and a volume of 200 mL is changed to 780 mmHg, then what will be the new volume?
svlad2 [7]
P1V1=P2V2
(600/760)(.200)=(780/760)x
x=.1538L or 153.8mL
8 0
3 years ago
Other questions:
  • How many electrons are lost from oxygen? CO2 + H2 —&gt; CO + H2O
    13·2 answers
  • Carbonic acid reacts with water to yield bicarbonate ions and hydronium ions: h2co3+h2o?hco3?+h3o+ identify the conjugate acid-b
    15·1 answer
  • Please answer these for me
    11·1 answer
  • More complex organisms came to be through ____________ to survive in the environment.
    10·2 answers
  • Enter your answer in the provided box. From the data below, calculate the total heat (in J) needed to convert 0.304 mol of gaseo
    15·1 answer
  • How many times bigger is the solar system than the earth ?
    9·2 answers
  • What types of chemical<br> reactions can change a toxic<br> chemical into one that is less<br> toxic
    15·1 answer
  • 3. What keeps Earth revolving around the sun?
    14·2 answers
  • Use significant digits to express the weight of a 150.0 lb person in kilograms ( 1 lb = 453.6 g)
    10·1 answer
  • In an electroplating apparatus, where does the reduction reaction occur?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!