Textbook Fundamentals J9

[Caitlin_Tang_Dis3H]

Identify the salt that is produced from the acid–base neutralization reaction between (a) potassium hydroxide and acetic acid,
(b) ammonia and phosphoric acid; (c) calcium hydroxide and bromous acid; (d) sodium hydroxide and hydrosulfuric acid,
(both atoms react). Write the complete ionic equation for each reaction.

Can someone help me understand how they got the chemical equations? I was able to find the salt but I don't think I got it through the same method.

[Rhea Jain 2I]

Hello! I can walk you through the steps that I did to solve these problems.

For me, I start with writing out the reactants. I'll use d (sodium hydroxide and hydrosulfuric acid) as an example. So that would look like this:
NaOH(aq) + H2S(aq)

Then, I would figure out which is the base and which is the acid, and dissociate the base. Here, the base is NaOH and the acid is H2S:
Na+(aq) + OH-(aq) + H2S(aq)

Next, I figure out the products based on this dissociation. In this case, the OH- and the H2 from the hydrosulfuric acid (because the problem says both hydrogens react) would form water, leaving a sodium and sulfur ion:
Na+(aq) + OH-(aq) + H2S(aq) -> Na+(aq) + S2-(aq)- + H2O(l)

Finally, I balance the equation:
2Na+(aq) + 2OH-(aq) + H2S(aq) -> 2Na+(aq) + S2-(aq) + 2H2O(l)

Hopefully this helps!