Answer to Question #286479 in Chemistry for khryst

Question

For Items 3 to 5, use the following reaction.

Fe(NO₃)₃ + NaOH → Fe(OH)₃ + NaNO₃

Which of the following are spectator ions?

a.      Fe³⁺ and OH⁻

b.     OH⁻ and NO₃⁻

c.      Na⁺ and NO₃⁻

d.     Na⁺ and OH⁻

     Which of the following is the net reaction for the reaction above?

a.      Fe(NO₃)₃ + NaOH → Fe(OH)₃ + NaNO₃

b.     Fe³⁺ + OH⁻ → Fe(OH)₃

c.      Na⁺ + NO₃⁻ → NaNO₃

d.     Fe³⁺ + NO₃⁻ + Na⁺ + OH⁻ → Fe³⁺ + OH⁻ + Na⁺ + NO₃⁻

e.      None, no precipitation reaction occured.

 

Answer 1

Solution:

Balanced chemical equation:

Fe(NO₃)₃(aq) + 3NaOH(aq) → Fe(OH)₃(s) + 3NaNO₃(aq)

The corresponding ionic equation is:

Fe³⁺(aq) + 3NO₃⁻(aq) + 3Na⁺(aq) + 3OH⁻(aq) → Fe(OH)₃(s) + 3Na⁺(aq) + 3NO₃⁻(aq)

Which of the following are spectator ions?

A spectator ion is an ion that does not take part in the chemical reaction and is found in solution both before and after the reaction.

In the above reaction, the sodium ion (Na⁺) and the nitrate ion (NO₃⁻) are both spectator ions.

Answer: c) Na⁺ and NO₃⁻

Which of the following is the net reaction for the reaction above?

The net ionic equation is the chemical equation that shows only those elements, compounds, and ions that are directly involved in the chemical reaction.

The corresponding net ionic equation is: Fe³⁺(aq) + 3OH⁻(aq) → Fe(OH)₃(s)

Answer: b) Fe³⁺(aq) + 3OH⁻(aq) → Fe(OH)₃(s)