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
defon
3 years ago
5

Look at sample problem 19.10 in the 8th ed Silberberg book. Write the Ksp expression. Find the concentrations of the ions you ne

ed (in this case Ca2 and F-). Put those concentrations into the Ksp expression to calculate Q. Compare Q to K A common laboratory method for preparing a precipitate is to mix solutions containing the component ions. Does a precipitate form when 10. ml of 0.0010 M Ca(NO3)2 is mixed with 10. ml of 0.00010 M NaF
Chemistry
1 answer:
777dan777 [17]3 years ago
3 0

Answer:

Explanation:

From the information given:

CaF_2 \to Ca^{2+} + 2F^-

Ksp = 3.2 \times 10^{-11}

no of moles of Ca^{2+} = 0.01 L × 0.0010 mol/L

no of moles of Ca^{2+} = 1 \times 10^{-5} \ mol

no of moles of F^- = 0.01 L × 0.00010 mol/L

no of moles of F^- = 1 \times 10^{-6}\ mol

Total volume = 0.02 L

[Ca^{2+}}] = \dfrac{1\times10^{-5} \ mol}{0.02 \ L} \\ \\  \\  \[[Ca^{2+}}] = 0.0005 \ mol/L

[F^{-}] = \dfrac{(1\times 10^{-6} \ mol)}{0.02 \ L}

[F^{-}] = 5 \times 10^{-5}  \ mol/L

Q = [Ca^{2+}][F^-]^2 \\ \\ Q = 0.0005 \times (5\times 10^{-5})^2 \\ \\ Q = 1.25 \times 10^{-12}

Since Q<ksp, then there will no be any precipitation of CaF2

You might be interested in
Law of Universal Gravitation (what factors affect gravity and how?)
olya-2409 [2.1K]

Explanation:

Hey there!

According to the law of gravitation, the factors that affects the gravity are:

  • Mass of the heavenly bodies.
  • Distance from the centre of the body to next body.

Mass of heavenly bodies:<em>The </em><em>ma</em><em>s</em><em>s </em><em>of </em><em>heavenly</em><em> bodies</em><em> </em><em>affect</em><em> </em><em>the </em><em>gravity</em><em>.</em><em> </em><em>We </em><em>know </em><em>that </em><em>gravity</em><em> is</em><em> </em><em>directly</em><em> proportional</em><em> to</em><em> the</em><em> </em><em>mass </em><em>of</em><em> heavenly</em><em> bodies</em><em>.</em><em> </em><em>so,</em><em> </em><em>when </em><em>the </em><em>mass </em><em>is </em><em>more </em><em>there </em><em>is </em><em>more </em><em>gravity </em><em>and </em><em>where</em><em> </em><em>there </em><em>is </em><em>less </em><em>mass </em><em>there </em><em>is </em><em>less </em><em>gravity</em><em>.</em>

Distance from the centre of the body to next body: <em>It </em><em>is</em><em> </em><em>one </em><em>of</em><em> the</em><em> </em><em>factor </em><em>to </em><em>influence</em><em> </em><em>gravity</em><em>.</em><em> </em><em>When </em><em>there </em><em>is</em><em> </em><em>more </em><em>distance</em><em> </em><em>there </em><em>is</em><em> </em><em>less </em><em>gravity</em><em> </em><em>and </em><em>where </em><em>there </em><em>is </em><em>distance</em><em> </em><em>more </em><em>force </em><em>is </em><em>there.</em><em> </em><em>Is </em><em>means </em><em>gravity</em><em> is</em><em> </em><em>inversely</em><em> proportional</em><em> to</em><em> </em><em>the </em><em>distance</em><em> </em><em>between </em><em>the </em><em>bodies</em><em>.</em>

<em><u>Hope </u></em><em><u>it</u></em><em><u> helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

7 0
2 years ago
g Tom's roommate Bob spilled crystal violet solution on his lab coat, and Tom offers to use some lye (sodium hydroxide solution)
irina [24]

Answer:

Tom is correct. The rate of reaction of Crystal violet and NaOH is first order with respect to NaOH, hence, a higher concentration of NaOH corresponds to a higher rate of reaction; a faster reaction.

This means the speed of cleaning depends on the concentration of the lye used.

Explanation:

The reaction between Crystal violet and NaOH, represented as

CV⁺ + OH⁻ → CVOH

It is a reaction that is know to turn the violet colour of the crystal violet colourless.

The rate of the reaction is also known to be second order; first order with respect to Crystal violet and first order with respect to NaOH.

This means that the rate of reaction is directly proportional to the concentration of NaOH provided all other parameters such as the rate constant and the concentration of Crystal violet are constant.

Hence, the reaction becomes faster with an increased concentration of NaOH.

So, Tom is right, concentrated lye solution would remove the stain faster.

Bob is wrong.

Hope this Helps!!!

4 0
3 years ago
Whats minimum temperature for scrabble eggs
Sonbull [250]

Answer:

of 160° F. Scrambled eggs need to be cooked until firm throughout with no visible liquid egg remaining.

hope it's help you.

8 0
2 years ago
Read 2 more answers
Helium, neon, and argon are examples of
iogann1982 [59]
C) Noble gases
The six noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Their atomic numbers are, respectively, 2, 10, 18, 36, 54, and 86.
4 0
3 years ago
Read 2 more answers
In the front of the room, there is a bottle that contains a 32.00 g sample of sulfur. This is
Vera_Pavlovna [14]
6.02x10^23 atoms is the answer
8 0
3 years ago
Other questions:
  • When there are equal forces from opposite directions acting on an object, the forces are said to be which of the following?
    8·1 answer
  • A parchment fragment was discovered that had about 68% as much 14C radioactivity as does plant material on Earth today. Estimate
    6·1 answer
  • Be sure to answer all parts. In the electrolysis of molten BaI2, (a) What product forms at the negative electrode? (b) What prod
    13·1 answer
  • When you find a new source of information, why is it important to think for yourself about whether to use that source?
    11·1 answer
  • A procedure calls for 0.250 kg of sugar. Your balance is in ounces. What mass in ounces should be weighed out on this balance?
    5·1 answer
  • The process of a liquid converting to a solid is called
    10·1 answer
  • BRAINLIESTTT ASAP! PLEASE HELP ME :)
    8·1 answer
  • Which circult is a serles circult?​
    14·1 answer
  • What role do plants have in the movement of water through the water cycle
    14·1 answer
  • What is the mass number of an atom that has 12 neutrons and 11 protons?<br> 24<br> 12<br> 11<br> 23
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!