Mass of CoCO3<span> is </span><span>118.9421 g/mol</span>
Which of the following statements are true about effusion of gases.
A. At the same temperature, lighter molecules move at a higher velocity than heavier ones.
B. Diffusion and effusion are similar because both involve the motion of gas molecules from
regions of higher concentration to lower concentration.
C. Effusion involves the movement of gas molecules through a small hole in a container.
D. According to Graham's Law, the relative rates of effusion of two gases is directly proportional
to the squares of their molar masses.
The solubilty product (Ksp) of PbCl₂ : Ksp = [Pb²⁺][Cl⁻]²
<h3>Further explanation</h3>
Given
PbCl₂ compound
Required
The solubilty product (Ksp)
Solution
Ksp is the product of ions in an equilibrium saturated state
For reaction :
AₓBₐ (s) ⇔ aAᵃ⁺ (aq) + b Bᵇ⁻ (aq)
Can be formulated :
Ksp = [Aᵃ⁺] ᵃ [Bᵇ⁻] ᵇ
For PbCl₂ :
PbCl₂(s)⇔Pb²⁺(aq) + 2Cl⁻(aq)
Ksp = [Pb²⁺][Cl⁻]²
The common ion effect is the decreased solubility of the ionic precipitate in the solution. To promote the precipitation of the calcium sulfate, magnesium sulfate must be added.
<h3>What is the common ion effect?</h3>
It is a phenomenon that is due to the addition of the common ion already present in the solution that affects the equilibrium and is used to decrease the solubility of the solute present in the solution to increase the precipitation rate.
Magnesium sulfate will be added to the solution as it already contains the sulfate ion in the form of calcium sulfate. This will increase the precipitation of the compound as the common ion added will decrease the solubility.
Therefore, magnesium sulfate will be added to promote precipitation.
Learn more about common ion effect here:
brainly.com/question/17278748
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