10. Write out the precipitation reaction formulas: NaOH(aq)+MgCl2(aq)>
a. Complete ionic reaction:
b. Net ionic reaction:
c. Molecular reaction:
*Please could some explain step by step why and how you solve this problem I do not understand at all . Thanks in advance!
This might help. See page 4.
http://fileserver.net-texts.com/asset.aspx?dl=no&id=5630
The hydroperoxide ion, HO2– (aq), reacts with permanganate ion, MnO4– (aq) to produce MnO2 (s) and oxygen gas. Balance the equation for the oxidation of hydroperoxide ion to O2(g) by permanganate ion in a basic solution.
You should make a separate post for another question. Piggy backed onto a previous post is likely to get it overlooked.
MnO4^- + 3e + 2H2O ==> MnO2 + 4OH^-
HO2^- + OH- ==> O2 + 2e + H2O
The two balanced half equations are written above. Multiply equation 1 by 2 and equation 2 by 3, then add the two.
To solve this problem, you need to understand the concepts of precipitation reactions and how to write ionic equations.
Step 1: Identify the reactants and products.
The reactants are NaOH(aq) and MgCl2(aq).
Step 2: Determine the products of the reaction.
The reaction between NaOH and MgCl2 will produce a precipitate, which is a solid. The products of the reaction are the solid precipitate and any remaining ions in the solution.
Step 3: Write the complete ionic equation.
To write the complete ionic equation, you need to break up the soluble ionic compounds into their respective ions.
NaOH(aq) dissociates into Na+(aq) and OH-(aq).
MgCl2(aq) dissociates into Mg2+(aq) and 2Cl-(aq).
Now you can write the complete ionic equation by combining the dissociated ions:
Na+(aq) + OH-(aq) + Mg2+(aq) + 2Cl-(aq)
Step 4: Write the net ionic equation.
The net ionic equation is obtained by cancelling out the spectator ions. Spectator ions are the ions that appear on both sides of the reaction and do not participate in the reaction.
In this case, Na+ and Cl- ions are spectator ions because they appear on both sides of the equation. Therefore, the net ionic equation is:
OH-(aq) + Mg2+(aq) -> Mg(OH)2(s)
Step 5: Write the molecular equation.
The molecular equation represents the overall reaction without separating the compounds into ions.
So the molecular equation is:
NaOH(aq) + MgCl2(aq) -> Mg(OH)2(s) + 2NaCl(aq)
To summarize:
a. The complete ionic reaction is: Na+(aq) + OH-(aq) + Mg2+(aq) + 2Cl-(aq)
b. The net ionic reaction is: OH-(aq) + Mg2+(aq) -> Mg(OH)2(s)
c. The molecular reaction is: NaOH(aq) + MgCl2(aq) -> Mg(OH)2(s) + 2NaCl(aq)
Remember, to solve similar problems, follow these steps:
1. Identify the reactants and products.
2. Determine the products of the reaction.
3. Write the complete ionic equation by breaking up the soluble ionic compounds into ions.
4. Cancel out the spectator ions to obtain the net ionic equation.
5. Write the molecular equation, representing the overall reaction.