Chemistry, 08.04.2020 16:18 shateece

Write a balanced net ionic equation to show why the solubility of mg(oh)2(s) increases in the presence of a strong acid and calculate the equilibrium constant for the reaction of this sparingly soluble salt with acid. use the pull-down boxes to specify states such as (aq) or (s). + + k =

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Answer from: zoriahmendoza

Net ionic equation

Mg(OH)2(s) + 2H+(aq) → Mg^2+(aq) + 2H20(l)

Kc = [MgCl2](aq) / [HCl]²(aq)

Explanation:

Step 1: Data given

Suppose the strong acid = HCl

Step 2: The balanced equation

Mg(OH)2(s) + HCl(aq) → ...

Mg(OH)2(s) + 2H+(aq) + 2Cl-(aq) → MgCl2(aq) + 2H2O(l)

Net ionic equation

Mg(OH)2(s) + 2H+(aq) + 2Cl-(aq) → MgCl2(aq) + 2H2O(l)

Mg(OH)2(s) + 2H+(aq) + 2Cl-(aq) → Mg^2+(aq) + 2Cl-(aq) + 2H20(l)

Mg(OH)2(s) + 2H+(aq) → Mg^2+(aq) + 2H20(l)

MgCl2 is more soluble than Mg(OH)2 so the solubility increases.

Is the question asking for the equilibrium constant for Pb(OH)2 or for PbCl2?

Equilibrium constant

Mg(OH)2(s) + 2HCl aq) → MgCl2(aq) + 2H2O(l)

Kc = [MgCl2](aq) / [HCl]²(aq)

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.

Answer from: Quest

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

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Write a balanced net ionic equation to show why the solubility of mg(oh)2(s) increases in the presen...

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