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
kykrilka [37]
4 years ago
5

The edge length of the unit cell of KCl (NaCl-like structure, FCC) is 6.28 Å. Assuming anion-cation contact along the cell edge,

calculate the radius of the potassium ion. The radius of the chloride ion is 1.82 Å.
Chemistry
1 answer:
Mila [183]4 years ago
4 0

Answer:

1.33 Å

Explanation:

Given that the edge length , a of the KCl which forms the FCC lattice = 6.28 Å

Also,

For the FCC lattice in which the anion-cation contact along the cell edge , the ratio of the radius of the cation to that of anion is 0.731.

Thus,

\frac {r^+}{r^-}=0.731 .................1

Also, the sum of the radius of the cation and the anion in FCC is equal to half of the edge length.

Thus,

r^++r^-=\frac {a}{2}  ...................2

Given that:

Cl^-\ (r^-) = 1.82\ \dot{A}

To find,

K^+\ (r^+) = ? \dot{A}

Using 1 and 2 , we get:

1.731\ r^+=0.731\times \frac {6.28}{2}

<u>Size of the potassium ion = 1.33 Å</u>

You might be interested in
What are the answer??
MrMuchimi

Answer:?

Explanation:None

4 0
3 years ago
Which is the least likely indicator that a chemical change has taken place in a substance?
Svetach [21]
Change in state of matter
6 0
4 years ago
Read 2 more answers
How many moles of nitrogen gas will occupy a volume of 5L at 3.85 atm and 27c?
Olegator [25]

Answer:

n=0.78mol

Explanation:

Hello there!

In this case, according to the given information, it possible for us to realize that this problem is solved via the ideal gas equation:

PV=nRT

By which we solve for n (moles) as shown below:

n=\frac{PV}{RT}

Then, we plug in the given pressure, volume and temperature (in K) to obtain:

n=\frac{3.85atm*5L}{0.08206\frac{atm*L}{mol*K}*(273+27)K} \\\\n=0.78mol

Regards!

7 0
3 years ago
Joseph wonders what kinds of animals that are carnivores live in his neighborhood. What skill will Joseph use to investigate the
Ierofanga [76]

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

3 0
3 years ago
Read 2 more answers
Calculate the number of photons that would be contained in a laserpulse with a wavelength of 287 nm that contained 4.35 mJ of en
OLEGan [10]

Answer:

3.46 ⋅ 10 − 19 J

Explanation:

The energy of a photon is proportional to its frequency,

4 0
3 years ago
Other questions:
  • A metal sample has a mass of 64.2 g. What is the density of this metal?
    5·1 answer
  • Classify the following reaction:
    8·1 answer
  • Describe a proton, neutron, and electron. Where are these particles located inside an atom.
    10·2 answers
  • Which group of measurements is the most precise?
    8·1 answer
  • Calculate molecular mass of C2H5OH​
    12·2 answers
  • Describe the effect of temperature on equilibrium constant.​
    10·1 answer
  • The solubility of agcl(s) in water at 25 ∘c is 1.33×10−5mol/l and its δh∘ of solution is 65.7 kj/mol. what is the solubility at
    9·1 answer
  • Which state of matter takes the shape of its container (solids, liquids, gases,).
    7·2 answers
  • (07.02 LC)
    15·2 answers
  • Question 4
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!