. Complete all the following for the reaction
(NH4)2S + Cd(NO3)2 --> CdS(s) + NH4NO3
1. Balance this equation
2. Write the ionic equation
3. Write the net ionic equation
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1. Balancing the equation:
(NH4)2S + Cd(NO3)2 → CdS + 2NH4NO3
2. Writing the ionic equation:
(NH4)2S(aq) + Cd(NO3)2(aq) → CdS(s) + 2NH4NO3(aq)
In the ionic equation, all the aqueous compounds are dissociated into their respective ions because they are soluble in water.
3. Writing the net ionic equation:
The net ionic equation is obtained by eliminating the spectator ions, which are the ions that do not participate in the reaction. In this case, the spectator ions are the ammonium ions (NH4+) and nitrate ions (NO3-). The remaining species are the ones involved in the reaction.
Net ionic equation:
S^2-(aq) + Cd^2+(aq) → CdS(s)
1. To balance the equation, we need to make sure that there is an equal number of each type of atom on both sides of the equation.
The given equation is:
(NH4)2S + Cd(NO3)2 --> CdS(s) + NH4NO3
To balance the equation, we start by counting the number of each type of atom on both sides of the equation.
On the left side, we have:
- 2 nitrogen atoms (N) from (NH4)2S
- 8 hydrogen atoms (H) from (NH4)2S
- 1 sulfur atom (S) from (NH4)2S
- 1 cadmium atom (Cd) from Cd(NO3)2
- 6 oxygen atoms (O) from Cd(NO3)2
On the right side, we have:
- 1 cadmium atom (Cd) from CdS(s)
- 1 sulfur atom (S) from CdS(s)
- 2 nitrogen atoms (N) from NH4NO3
- 3 hydrogen atoms (H) from NH4NO3
- 3 oxygen atoms (O) from NH4NO3
To balance the equation, we can start by balancing the nitrogen and hydrogen atoms first. We can achieve this by placing a coefficient of 2 in front of NH4NO3 and a coefficient of 2 in front of (NH4)2S.
The balanced equation is:
2 (NH4)2S + Cd(NO3)2 --> CdS(s) + 2 NH4NO3
2. To write the ionic equation, we first need to identify the ions present in the chemical reaction.
(NH4)2S dissociates into the ammonium ion (NH4+) and the sulfide ion (S2-).
Cd(NO3)2 dissociates into the cadmium ion (Cd2+) and two nitrate ions (NO3-).
CdS(s) does not dissociate as it is a solid precipitate.
NH4NO3 dissociates into the ammonium ion (NH4+) and the nitrate ion (NO3-).
The ionic equation is:
2 NH4+ (aq) + S2- (aq) + Cd2+ (aq) + 2 NO3- (aq) --> CdS(s) + 2 NH4+ (aq) + 2 NO3- (aq)
3. To write the net ionic equation, we need to remove the spectator ions. Spectator ions are the ions that are present on both sides of the equation and do not directly participate in the reaction. In this case, the ammonium ion (NH4+) and the nitrate ion (NO3-) are the spectator ions.
The net ionic equation is:
S2- (aq) + Cd2+ (aq) --> CdS(s)