Question

Give the conjugate acid for each compound below. hco3-

Answer 1

Answer is: conjugate acid for HCO₃⁻ is H₂CO₃.
According to  Bronsted-Lowry theory acid are donor of protons and bases are acceptors of protons (the hydrogen cation or H⁺). 
Hydrogencarbonate (HCO₃⁻) is Bronsted base and it can accept proton and become conjugate acid (carbonic acid H₂CO₃):
HCO₃⁻(aq) + H⁺(aq) → H₂CO₃(aq).

Answer 2

$\boxed{\text{H}_2\text{CO}_3}$ is conjugate acid for $\text{HCO}_3^-$.

Further Explanation:

Acids and bases:

(I) Arrhenius theory:

According to Arrhenius concept, substances that donate hydrogen ion or protons in solutions are termed as acids while substances that donate hydroxide ions in solutions are bases. For example, HCl and $\text{HNO}_3$ act as Arrhenius acid while KOH and NaOH act as Arrhenius base.

(II) Bronsted-Lowry theory:

This concept defines proton-donor substances as acids and proton-acceptor substances as bases. For example,$\text{H}_2\text{O}$ is Bronsted-Lowry acid while $\text{NH}_3$ is Bronsted-Lowry base.

(III) Lewis theory:

According to this theory, substances that can accept electron pairs are acids whereas bases can donate electrons to other species. For example, $\text{BF}_3$ is Lewis acid while $\text{H}_2\text{O}$ is Lewis base.

Conjugate bases are formed if hydrogen ions are removed from respective acids while formation of conjugate acids result from addition of hydrogen ions to respective bases. So conjugate acid of $\text{HCO}_3^-$ is formed by addition of hydrogen ions as follows:

$\text{HCO}_3^-+\text{H}^+\rightleftharpoons\text{H}_2\text{CO}_3$

Therefore $\text{H}_2\text{CO}_3$ is conjugate acid of $\text{HCO}_3^-$.

Learn more:

1. Reason for acidity of water: https://brainly.com/question/1550328

2. Reason for the acidic and basic nature of amino acid: https://brainly.com/question/5050077

Answer details:

Grade: Senior school

Subject: Chemistry

Chapter: Acids, base and salts

Keywords: acid, base, Arrhenius theory, Bronsted Lowry theory, Lewis theory, HCO3-, H2CO3, H+, conjugate acid, proton-donor substances, proton-acceptor substances, conjugate base.