Question #12933

1 Answer
May 19, 2016

"HNO"_ (3(aq)) + "LiOH"_ ((aq)) -> "LiNO"_ (3(aq)) + "H"_ 2"O"_((l))HNO3(aq)+LiOH(aq)LiNO3(aq)+H2O(l)

Explanation:

You're dealing with a neutralization reaction in which nitric acid, "HNO"_3HNO3, reacts with lithium hydroxide, "LiOH"LiOH, to produce aqueous lithium nitrate, "LiNO"_3LiNO3, and water.

The balanced chemical equation that describes this reaction looks like this

"HNO"_ (3(aq)) + "LiOH"_ ((aq)) -> "LiNO"_ (3(aq)) + "H"_ 2"O"_((l))HNO3(aq)+LiOH(aq)LiNO3(aq)+H2O(l)

Nitric acid is a strong acid, which means that it ionizes completely in aqueous solution to form hydronium cations, "H"_3"O"^(+)H3O+, and nitrate anions, "NO"_3^(-)NO3

"HNO"_ (3(aq)) + "H"_ 2"O"_ ((l)) -> "H"_ 3"O"_ ((aq))^(+) + "NO"_(3(aq))^(-)HNO3(aq)+H2O(l)H3O+(aq)+NO3(aq)

Lithium hydroxide is a strong base, so it too will ionize completely in aqueous solution to form lithium cations, "Li"^(+)Li+, and hydroxide anions, "OH"^(-)OH

"LiOH"_ ((aq)) ->."Li"_ ((aq))^(+) + "OH"_((aq))^(-)LiOH(aq).Li+(aq)+OH(aq)

The complete ionic equation for this reaction will look like this

"H"_ 3"O"_ ((aq))^(+) + "NO"_ (3(aq))^(-) + "Li"_ ((aq))^(+) + "OH"_ ((aq))^(-) -> "Li"_ ((aq))^(+) + "NO"_ (3(aq))^(-) + 2"H"_ 2"O"_((l))H3O+(aq)+NO3(aq)+Li+(aq)+OH(aq)Li+(aq)+NO3(aq)+2H2O(l)

The net ionic equation, which doesn't include spectator ions, will look like this

"H"_ 3"O"_ ((aq))^(+) + color(red)(cancel(color(black)("NO"_ (3(aq))^(-)))) + color(red)(cancel(color(black)("Li"_ ((aq))^(+)))) + "OH"_ ((aq))^(-) -> color(red)(cancel(color(black)("Li"_ ((aq))^(+)))) + color(red)(cancel(color(black)("NO"_ (3(aq))^(-)))) + 2"H"_ 2"O"_((l))

This is equivalent to

"H"_ 3"O"_ ((aq))^(+) + "OH"_ ((aq))^(-) -> 2"H"_ 2"O"_((l))

This tells you that the hydronium cations coming from the acid and the hydroxide anions coming from the base neutralize each other to form water.