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nirvana33 [79]
3 years ago
5

The molar solubility of C a ( O H ) 2 C a ( O H ) 2 was experimentally determined to be 0.019 M. Based on this value, what is th

e K s p K s p of C a ( O H ) 2 C a ( O H ) 2 ?
Chemistry
1 answer:
Anuta_ua [19.1K]3 years ago
8 0

Answer:

Ksp = 2.74 x 10⁻⁵

Explanation:

The solubility equilibrium for Ca(OH)₂ is the following:

  Ca(OH)₂(s) ⇄ Ca²⁺(aq) + 2 OH⁻(aq)

I                          0                0

C                       + s               + 2s

E                        s                   2s

According to the ICE table, the expression for the solubility product constant (Kps) is:

Ksp = [Ca²⁺] x ([OH⁻])² = s x (2s)² = 4s³

Then, we calculate Ksp from the solubility value (s):

s = 0.019 M

⇒ Ksp = 4s³ = 4 x (0.019)³ = 2.74 x 10⁻⁵

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Stella [2.4K]

The pressure of the nitrogen gas produced is determined as 44.77 atm.

<h3>What is the pressure of the Nitrogen gas?</h3>

The pressure of the nitrogen gas is determined from ideal gas equation, as shown below;

PV = nRT

P = nRT/V

where;

  • n is number of moles = 2 moles
  • R is ideal gas constant = 0.08205 L.atm/mol.K
  • T is temperature = 68⁰C = 68 + 273 = 341 K
  • V is volume = 1.25 L

P = (2 x 0.08205 x 341)/(1.25)

P = 44.77 atm.

Learn more about pressure here: brainly.com/question/25736513

#SPJ1

3 0
2 years ago
Its atoms contain 3 protons and 4 neutron(s).<br> Express your answer as an isotope.
velikii [3]

Answer: A=7 for the isotope with 4 neutrons.

Explanation:A lithium atom contains 3 protons in its nucleus. Notice that because the lithium atom always has 3 protons, the atomic number for lithium is always Z = 3. The mass number, however, is A = 6 for the isotope with 3 neutrons, and A = 7 for the isotope with 4 neutrons.

3 0
3 years ago
Identify one disadvantage to each of the following models of electron configuration
8_murik_8 [283]

Answer:

The disadvantages or the limitations are as follows:

Dot structures: based on an empirical trend “atoms like octets”, not a rigorous description of the true nature of electrons

Arrow and line diagrams: Does not say much of the possible properties of the molecule.

Written electron configurations: no 3D representation of the molecule or the atom

Explanation:

please mark my answer as brain list

3 0
4 years ago
Why do different substances heat up and cool down at different rates?
shepuryov [24]
Each substance has its own unique structure and properties that are based on these structures.

One of those most important properties is the "specific heat" value.
Specific heat is defined as the amount of heat required to raise the temperature of a unit mass of a substance by 1 degree Celsius.

Each substance has its own specific heat. The higher the specific heat of a substance, the longer it will take to heat up or cool down.

Hope this helps :)
7 0
4 years ago
What is the ph of a 0.15 m solution of ammonium bromide?
pochemuha
NH3 + H20 YIELDS NH4+ + OH-

So, the NH3 and the OH- are stoichiometrically equivalent.

So, we have 0.15M OH-

p OH = -log [OH-]

p OH = -log[0.15) = 0.824

pH = 14 - p OH

pH = 13.18
5 0
3 years ago
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