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
zlopas [31]
3 years ago
15

15.24. Calcium hydroxide, also known as slaked lime, is used in industrial processes in which low concentrations of base are req

uired. Only 0.16 g of Ca(OH)2 dissolves in 100 mL of water at 25°C. What is the concentration of hydroxide ions in 250 mL of a solution containing the maximum amount of dissolved calcium hydroxide?​
Chemistry
1 answer:
Ivahew [28]3 years ago
7 0

The concentration of the hydroxide ions, OH¯ in 250 mL of the solution containing the maximum amount of dissolved calcium hydroxide is 0.01728 M

We'll begin by calculating the number of mole of in 0.16 g of Ca(OH)₂. This can be obtained as follow:

Mass of Ca(OH)₂ = 0.16 g

Molar mass of Ca(OH)₂ = 40 + 2[16 + 1] = 74 g/mol

<h3>Mole of Ca(OH)₂ =? </h3>

Mole = mass / molar mass

Mole of Ca(OH)₂ = 0.16 / 74

<h3>Mole of Ca(OH)₂ = 0.00216 mole </h3>

  • Next, we shall determine the molarity of the stock solution of Ca(OH)₂.

Mole of Ca(OH)₂ = 0.00216 mole

Volume = 100 mL = 100 / 1000 = 0.1 L

<h3>Molarity of Ca(OH)₂ =? </h3>

Molarity = mole / Volume

Molarity of Ca(OH)₂ = 0.00216 / 0.1

<h3>Molarity of Ca(OH)₂ = 0.0216 M</h3>

  • Next, we shall determine the molarity of the diluted solution. This can be obtained as follow:

Volume of stock solution (V₁) = 100 mL

Molarity of stock solution (M₁) = 0.0216 M

Volume of diluted solution (V₂) = 250 mL

<h3>Molarity of diluted solution (M₂) =?</h3>

<h3>M₁V₁ = M₂V₂</h3>

0.0216 × 100 = M₂ × 250

2.16 = M₂ × 250

Divide both side by 250

M₂ = 2.16 / 250

<h3>M₂ = 0.00864 M</h3>

Thus, the molarity of the diluted solution is 0.00864 M

  • Finally, we shall determine the concentration of the hydroxide ions, OH¯ in the diluted solution. This can be obtained as follow:

Ca(OH)₂(aq) —> Ca²⁺(aq) + 2OH¯(aq)

From the balanced equation above,

1 mole of Ca(OH)₂ contains 2 moles of OH¯

Therefore,

0.00864 M Ca(OH)₂ will contain =  2 × 0.00864 = 0.01728 M OH¯

Thus, the concentration of the hydroxide ions, OH¯ in 250 mL of the solution containing the maximum amount of dissolved calcium hydroxide is 0.01728 M

Learn more: brainly.com/question/11471182

You might be interested in
What are the coefficients that would balance this equation _____NaOH+____H2CO3-Na2CO3+_____H2O
FromTheMoon [43]
I don’t see any equal signs to make it an equation. Am I missing something?
4 0
2 years ago
What was significant about the rocks Darwin found in the mountains
inn [45]
Sea fossils were found on top of the mountains which gave evidence of evolution for continents and oceans
5 0
3 years ago
A phospholipid has a glycerol attached to a phosphate group and two fatty acid chains. The head is hydrophilic, and the tail is
Rzqust [24]

Answer:

Because they are normally dissolved in water

Explanation:

The phospholipids can act as molecules that are carry inside or outside the cells, to transport it they are dissolved in another hydrophilic media, in this way the hydrophilic part can be in the outside part of the group of moleucles stick together like in cell membranes that are conformed by a double lipidic layer, in which the hydrophobic part it in the inside part. The cells normally are surrounded by different water solutions as the blood or another solutions.

7 0
3 years ago
Zirconium has an atomic number of 40, And an atomic mass of 91. How many electrons does zirconium have?
Vedmedyk [2.9K]
Answer: 40

Explanation: Whatever the atomic number is, that’s also the number of electrons and protons.
3 0
2 years ago
Read 2 more answers
Which role of water is significant for most living things in a biological system?a. It prevents many life processes from occurri
Sedaia [141]
I am pretty sure the correct answer is C.  Water has large heat capacity meaning it can absorb a lot of energy before changing temperature.  That helps the body regulate heat since it can be exposed to different environments and experience small temperature changes.

I hope this helps.  Let me know if anything is unclear.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which of these minerals and mineral resources is composed of the remains of ancient marine organisms
    6·2 answers
  • Which of the following Period 4 elements has the most metallic characteristics?
    15·2 answers
  • ___Li+ __Br, - _LiBr,
    13·1 answer
  • Determine which elements or compounds are missing from the following reaction equation: hydrogen + ________ → water
    7·1 answer
  • How does the average reaction rate differ from an instantaneous reaction rate?
    6·1 answer
  • How many liters of 1.5 M potassium permanganate could be made if 152 g of the solute are available?
    9·2 answers
  • Help this is an earthquake thing
    6·1 answer
  • HELP ME, MARKED AS BRAINEST
    6·1 answer
  • Archimedes himself had a mass of 52 kg when he discovered displacement. If his density was roughly 12 g/mL, calculate the amount
    9·2 answers
  • How much heat is released if a 10.0 gram piece of aluminum is cooled from 70°C to 50°C?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!