Write the net ionic equation for the reaction that takes place between a solution of magnesium chloride and a solution of sodium hydroxide.
Mg^2+(aq) + 2OH^-(aq) ==> Mg(OH)2(s)
To write the net ionic equation for the reaction between magnesium chloride (MgCl2) and sodium hydroxide (NaOH), we first need to determine the chemical formulas of the products formed.
The chemical formula for magnesium chloride is MgCl2, indicating that it contains one magnesium ion (Mg2+) and two chloride ions (Cl-). Likewise, sodium hydroxide has the chemical formula NaOH, consisting of one sodium ion (Na+) and one hydroxide ion (OH-).
When these two ionic compounds react, the cations and anions will combine to form new compounds. In this case, the magnesium ion (Mg2+) will combine with the hydroxide ion (OH-) to form magnesium hydroxide (Mg(OH)2):
Mg2+ + 2OH- → Mg(OH)2
The sodium ion (Na+) and the chloride ion (Cl-) do not undergo any changes during the reaction and remain as soluble ions in the solution.
Therefore, the net ionic equation for the reaction can be written as:
Mg2+ + 2OH- → Mg(OH)2
To write the net ionic equation for the reaction between magnesium chloride (MgCl2) and sodium hydroxide (NaOH), we first need to write the balanced molecular equation.
The chemical equation for the reaction between magnesium chloride and sodium hydroxide is:
MgCl2(aq) + 2NaOH(aq) → Mg(OH)2(s) + 2NaCl(aq)
Now, let's break down the equation into its ionic components. In solution, magnesium chloride dissociates into magnesium ions (Mg2+) and chloride ions (Cl-), while sodium hydroxide dissociates into sodium ions (Na+) and hydroxide ions (OH-):
Mg2+(aq) + 2Cl-(aq) + 2Na+(aq) + 2OH-(aq) → Mg(OH)2(s) + 2Na+(aq) + 2Cl-(aq)
Next, we can cancel out the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the reaction. The spectator ions in this case are the sodium ions (Na+) and chloride ions (Cl-):
Mg2+(aq) + 2OH-(aq) → Mg(OH)2(s)
Finally, we can write the net ionic equation by removing the spectator ions:
Mg2+(aq) + 2OH-(aq) → Mg(OH)2(s)
So, the net ionic equation for the reaction between magnesium chloride and sodium hydroxide is Mg2+(aq) + 2OH-(aq) → Mg(OH)2(s).