2 NO(g) + O2(g) = 2 NO,(9) AH < 0 Which of the following changes alone would cause a decrease in the value of Kg
for the reaction represented above?
a. Decreasing the temperature
b. Increasing the temperature
c. Decreasing the volume of the reaction vessel
d. Increasing the volume of the reaction vessel
e. Adding a catalyst

The balanced equation for this neutralization reaction is:

⇒

Explanation:

Hydrobromic acid is a strong acid. It is produced by dissolving hydrogen bromide (HBr) in water. Thus, its phase is aqueous (aq).

Potassium hydroxide is a strong base, usually commercialized as colorless pellets (s), but could be easily dissolved in water to ease the reaction, that is why it will be considered aqueous for this reaction.

The reaction between an acid and a base is called neutralization reaction, and it produces liquid water (l) and salt, as follows:

    ⇒

We can check that this equation is balanced since it has the same amount of each element on both sides of the equation:

⇒    

K:   0      +      1       =       1      +      0

Br:   1       +     0       =       1      +      0

H:   1       +     1        =       0     +      2

O:    0      +     1        =       0     +      1