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
Mashutka [201]
3 years ago
14

Calculate the molar solubility of CaF2 in a 0.25 m solution of NaF(aq).

Chemistry
1 answer:
Kipish [7]3 years ago
8 0

Answer:

6.4 × 10^-10 M

Explanation:

The molar solubility of the ions in a compound can be calculated from the Ksp (solubility constant).

CaF2 will dissociate as follows:

CaF2 ⇌Ca2+ + 2F-

1 mole of Calcium ion (x)

2 moles of fluorine ion (2x)

NaF will also dissociate as follows:

NaF ⇌ Na+ + F-

Where Na+ = 0.25M

F- = 0.25M

The total concentration of fluoride ion in the solution is (2x + 0.25M), however, due to common ion effect i.e. 2x<0.25, 2x can be neglected. This means that concentration of fluoride ion will be 0.25M

Ksp = {Ca2+}{F-}^2

Ksp = {x}{0.25}^2

4.0 × 10^-11 = 0.25^2 × x

4.0 × 10^-11 = 0.0625x

x = 4.0 × 10^-11 ÷ 6.25 × 10^-2

x = 4/6.25 × 10^ (-11+2)

x = 0.64 × 10^-9

x = 6.4 × 10^-10

Therefore, the molar solubility of CaF2 in NaF solution is 6.4 × 10^-10M

You might be interested in
Check out this app! It's millions of students helping each other get through their schoolwork. https://brainly.app.link/qpzV02Ma
marishachu [46]

Answer:

why did you post a link to brainly when we are on brainly already??????

Explanation:

8 0
2 years ago
Drawing a conclusion derived from knowledge of an established principle is called _____. inductive reasoning abductive reasoning
san4es73 [151]

a.)Inductive Reasoning

is the answer

5 0
2 years ago
Read 2 more answers
How many grams of KF are in 2 liters of a 3.0 M solution of KF
Rufina [12.5K]

Answer:

mass ( g ) = 348 g

Explanation:

First you know : M = mole / volume (L)

in question you have the M and V and the formula of SUBSTANCE ( KF )

first you get the number of mole from equation above

so 3 = no of mole / 2

no of mole = 3 × 2 = 6 moles

and the moles equation is no of moles = mass ( g ) / molecular weight ( g/mole )

so you have already calculate the moles and you can know the MW from the Question

Mw of KF = 39 + 19 = 58

so n = mass / MW

so 6 = mass / 58

mass ( g ) = 348 g

GOOD LUCK

4 0
3 years ago
Which is not true about the upper paleolithic period?.
jok3333 [9.3K]

Answer:The Upper Paleolithic period started about 40,000 years BC and ended about 10,000 years BC. So it took place between 40,000 and 10,000 BC. After that started the Mesolithic Era ( 10,000 to 4,000 BC ). Stone tools in the Upper Paleolithic period were primarly blade-based technology. Also this period is well known for the cave art and paintings of animals. Answer: C ) The period took place between 40,000 and 4,000 BC ( not true ).

Explanation:

5 0
1 year ago
Do baboons have a large brain?
olchik [2.2K]
Yes. Baboons have larger brains than chimpanzees
8 0
3 years ago
Other questions:
  • What is charge on the cation SnCl4
    8·2 answers
  • Is shaving cream a constant for making fake snow?<br><br> U get 71 pts!
    13·1 answer
  • How much energy is needed to melt 47.6g of water
    13·1 answer
  • Consider a 125 mL buffer solution at 25°C that contains 0.500 mol of hypochlorous acid (HOCl) and 0.500 mol of sodium hypochlori
    13·1 answer
  • | What material does Not Melt At any<br> temperature?
    9·1 answer
  • Alum used in cooking is potassium aluminum sulfate hydrate, KAl(SO4)2. XH2O. To find the value of X, you can heat the sample of
    7·1 answer
  • Hawaii, which sits over a hot spot located near the center of the Pacific
    6·1 answer
  • Ren runs a hamburger stand and needs to clean up a season’s worth of grease buildup on the range hood over his griddle. Explain
    13·2 answers
  • Ions of an element (elements with different charges) contain different numbers of what
    15·1 answer
  • An unknown amount of sodium azide (NaN3) reacts and produces 0.033 moles of nitrogen gas. What mass of sodium metal is produced
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!