Write balanced molecular equation for the reaction betwoon hydrobromic acid and potassium hydroxide. Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣ ? A chemical reaction does not occur for this question.

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26-05-2023
Chemistry

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Write balanced molecular equation for the reaction betwoon hydrobromic acid and potassium hydroxide. Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣ ? A chemical reaction does not occur for this question.

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theleangreenbean theleangreenbean · Answer 1 · 2023-05-26T01:31:57+02:00

Writing Balanced Chemical Equations

These equations must include the state of each reactant and product (solid, liquid gas, aqueous) as well as their balanced coefficients. There should be the same number of atoms for each element on both sides of the equation.

Solution

Hydrobromic acid + potassium hydroxide ⇒ ?

HBr(aq) + KOH(aq) ⇒ ?

Firstly, we know that a chemical reaction does occur as the reactants are an acid and a base. We also know that both of these reactants are aqueous (aq; meaning in a solution with water), as this is the typical condition of acids and bases.

Acids and bases react to give us a salt and water (which is almost always in liquid form):

HBr(aq) + KOH(aq) ⇒ H₂O(l) + KBr(aq)

After we remove H from HBr(aq) and OH from KOH(aq) to make H₂O(l), what we're left with is K and Br, which will react to make KBr(aq).

We know KBr is aqueous, meaning in solution, because halides are always aqueous except when bonded to the following cations: Ag, Hg, Pb, Cu, Tl. Potassium is not in this list, making KBr soluble.

Now, after checking that there is the same number of every atom on each side of the equation, we can say that this is our final balanced equation:

HBr(aq) + KOH(aq) ⇒ H₂O(l) + KBr(aq)

Answer

HBr(aq) + KOH(aq) ⇒ H₂O(l) + KBr(aq)

Other things to note

We know KOH(aq) is a base because it contains the hydroxide (OH-) ion. Molecules that contain this are typically basic.
To get better at writing balanced equations with states, a good idea would be to memorize common reaction types, states of common compounds, solubility rules and common polyatomic ions.