the net ionic equation for the following molecular equation
KNO2(aq) + HCl(aq) KCl(aq) + HNO2(aq)
NO2^- + H^+ ==> HNO2
To write the net ionic equation, we need to break down the aqueous compounds into their respective ions and identify any spectator ions that do not participate in the reaction.
The molecular equation is:
KNO2(aq) + HCl(aq) → KCl(aq) + HNO2(aq)
Step 1: Write the complete ionic equation by separating the compounds into ions:
K+(aq) + NO2-(aq) + H+(aq) + Cl-(aq) → K+(aq) + Cl-(aq) + HNO2(aq)
Step 2: Identify the spectator ions. These are the ions that appear on both sides of the equation and do not participate in the reaction. In this case, the K+ and Cl- ions are spectator ions.
Step 3: Write the net ionic equation by removing the spectator ions:
NO2-(aq) + H+(aq) → HNO2(aq)
Therefore, the net ionic equation for the given molecular equation is:
NO2- (aq) + H+ (aq) → HNO2 (aq)
To determine the net ionic equation, which shows only the species that participate in the reaction, you need to first write the balanced molecular equation.
The balanced molecular equation for the reaction is:
KNO2(aq) + HCl(aq) → KCl(aq) + HNO2(aq)
To find the net ionic equation, you need to identify the ions present in the aqueous solutions and determine which ions participate in a chemical reaction.
In this reaction, both KNO2 and HCl are aqueous (aq) compounds, which means they dissociate into their respective ions when dissolved in water.
The dissociation of KNO2 (potassium nitrite) yields the following ions:
KNO2(aq) → K+(aq) + NO2-(aq)
The dissociation of HCl (hydrochloric acid) yields the following ions:
HCl(aq) → H+(aq) + Cl-(aq)
Now that we have identified the dissolved ions, we can construct the net ionic equation. The net ionic equation shows only the ions that participate in the reaction. In this case, the K+ and Cl- ions do not participate because they are present as both the reactants and products in their fully ionic forms.
The net ionic equation for the reaction is:
H+(aq) + NO2-(aq) → HNO2(aq)
So, the net ionic equation for the given molecular equation is:
H+(aq) + NO2-(aq) → HNO2(aq)
This shows that the reaction involves the transfer of a hydrogen ion (H+) from the hydrochloric acid to the nitrite ion (NO2-) to form nitrous acid (HNO2).