Which of the following is true about the reaction between sodium bromide and silver sulfate?
1. No reaction
2. Total ionic equation is identical to the net ionic equation
3. Sodium ions and sulfate ions are present in the toal ionic equation but not in the net ionic equation
4. Bromide is a spectator ion
3 is the only one that fits.
The net ionic equation is
Ag^+(aq) + Br^-(aq) ==> AgBr(s)
To determine which of the given statements is true about the reaction between sodium bromide (NaBr) and silver sulfate (Ag2SO4), we need to understand the reaction and its ionic equations.
The balanced chemical equation for the reaction is:
2 NaBr + Ag2SO4 -> 2 AgBr + Na2SO4
Now let's evaluate each statement:
1. No reaction: This statement is false because there is a reaction between sodium bromide and silver sulfate, as shown by the balanced chemical equation.
2. Total ionic equation is identical to the net ionic equation: This statement is false. The total ionic equation shows all the ionic species present in the reaction, including spectator ions. The net ionic equation, on the other hand, only includes the species that participate in the reaction. We need to write the ionic equations to determine if they are identical or different.
3. Sodium ions and sulfate ions are present in the total ionic equation but not in the net ionic equation: This statement is true. Let's write the total ionic equation to see why:
2 Na+ + 2 Br- + 2 Ag+ + SO4^2- -> 2 AgBr + Na2SO4
In the total ionic equation, we can see that both sodium ions (Na+) and sulfate ions (SO4^2-) are present.
However, in the net ionic equation, spectator ions are removed. Spectator ions are ions that do not participate in the reaction and remain unchanged on both sides of the equation. In this case, sodium ions (Na+) and sulfate ions (SO4^2-) are spectator ions. So, they are not present in the net ionic equation.
The net ionic equation is:
2 Br- + 2 Ag+ -> 2 AgBr
4. Bromide is a spectator ion: This statement is false. Bromide ions (Br-) do participate in the reaction and are not spectator ions.
Therefore, the correct statement is:
3. Sodium ions and sulfate ions are present in the total ionic equation but not in the net ionic equation.