Chemistry, 06.11.2020 17:10 Arealbot

What is the concentration of silver ions in a saturated solution of Ag3PO4? Ksp (Ag3PO4) = 8.9 x 10−17.

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Answer from: Geo777

4.3x10⁻⁵ mol/L.

Explanation:

Hello there!

In this case, since the dissolution of silver phosphate is not completely achieved due to its low solubility in water, we can represent this as an equilibrium problem by which it separates into silver and phosphate ions:

$Ag_3PO_4(s)\rightleftharpoons 3Ag^+(aq)+PO_4^{3-}(aq)$

Which are slightly soluble in water; it means that the equilibrium expression is:

$Ksp=[Ag^+]^3[PO_4^{3-}]$

Thus, since we know the solubility product and the concentration of these ions in a saturated solution is represented by the reaction extent , we can write:

$8.9x10^{-17}=(3x)^3(x)$

Thus, solving for we obtain:

$x=\sqrt[4]{\frac{8.9x10^{-17}}{27} } \\\\x=4.3x10^{-5}M$

Thus, the molar concentration of silver ions is 4.3x10⁻⁵ mol/L.

Best regards!

Answer from: Quest

for points guys

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

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What is the concentration of silver ions in a saturated solution of Ag3PO4? Ksp (Ag3PO4) = 8.9 x 10...

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