The net ionic equation of the reaction
a. Mg²⁺ (aq) + 2OH⁻ (aq) ---> MgOH₂ (s)
b. Ba²⁺(aq) + SO₄²⁻(aq) ----> BaSO₄(s)
<h3>Further explanation
</h3>
The electrolyte in the solution produces ions.
The equation of a chemical reaction can be expressed in the equation of the ions
For strong electrolytes (the ionization rate = 1) is written in the form of separate ions, while the weak electrolyte (degree of ionization <1) is still written as an un-ionized molecule
In the ion equation, there is an ion spectator that is the ion which does not react because it is present before and after the reaction
When these ions are removed, the ionic equation is called the net ionic equation
For gases and solids including water (H₂O) can be written as an ionized molecule
So only the dissolved compound is ionized ((expressed in symbol aq)
Formation of precipitating compounds that cause reactions can occur from double-replacement reactions
Solubility Rules:
• 1. soluble compound
All compounds of Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, and NH₄⁺
All compounds of NO₃⁻ and C₂H₃O₂⁻
Compounds of Cl⁻, Br⁻, I⁻ except Ag⁺, Hg₂²⁺, Pb²⁺
Compounds of SO₄²⁻ except Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺
• 2. insoluble compounds
Compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, and NH₄⁺
Compounds of OH− except Compounds of Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, NH₄⁺, Sr²⁺, and Ba²⁺
the reaction of MgCl₂ with NaOH:
MgCl₂ (aq) + 2NaOH (aq) -> Mg(OH)₂ (s) + 2NaCl (aq)
complete ion reaction:
Mg²⁺ (aq) + 2Cl⁻ (aq) + 2Na⁺ (aq) + 2OH⁻ (aq) -> Mg(OH)₂ + 2Na⁺ (aq) + 2Cl⁻(aq)
net ionic equation: Mg²⁺ (aq) + 2OH⁻ (aq) ---> MgOH₂ (s)
the reaction of MgSO₄ with BaCl₂
MgSO₄ (aq) + BaCl₂ (aq) -> BaSO₄ (s) + MgCl₂ (aq)
Complete ion reaction:
<h3>Learn more </h3>
the net ionic equation
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Keywords: the net ionic equation, spectator ions, molecular equation,full ionic equation