Question

What is the coefficient for H2O(l) when S2-(aq) + NO3-(aq) → S(s) + NO(g) is balanced in acidic aqueous solution? a) 1 b) 2 c) 3 d) 4

Answer 1

To balance the given chemical equation S2-(aq) + NO3-(aq) → S(s) + NO(g) in acidic solution, the coefficient for H2O(l) is 4.

Step-by-step explanation:

To balance the given chemical equation in acidic aqueous solution:

S2-(aq) + NO3-(aq) → S(s) + NO(g)

First, we need to balance the atoms except for hydrogen and oxygen. The sulfur is already balanced on both sides. To balance the nitrogen atoms, we need to add a coefficient of 2 in front of NO3-. The equation becomes:

S2-(aq) + 2NO3-(aq) → S(s) + NO(g)

Next, we balance the oxygen atoms by adding water molecules (H2O). In this case, the coefficient for H2O(l) is 4. So, the balanced equation is:

S2-(aq) + 2NO3-(aq) → S(s) + NO(g) + 4H2O(l)

Therefore, the correct coefficient for H2O(l) is 4.

Answer 2

The coefficient of H2O(l) in the balanced redox reaction S2-(aq) + NO3-(aq) → S(s) + NO(g) in acidic aqueous solution is 2. So, option b) 2 is the correct answer.

Step-by-step explanation:

The question is asking for the coefficient of H2O(l) when the given redox reaction is balanced in acidic aqueous solution.

Balancing redox reactions in acid solution often involves adding H2O to balance oxygen atoms and H+ to balance hydrogen atoms.

Here is the balanced reaction:

S2-(aq) + 4NO3-(aq) + 4H+ → S(s) + 4NO(g) + 2H2O(l)

In the balanced equation, the coefficient for H2O(l) is 2.

his means that 2 molecules of water are produced in the reaction, indicating that option b) 2 is the correct answer.