Diketahui reaksi:HCOOH+HNO2 <--> HCOOH2^++NO2^-yang merupakan pasangan asam-basa konjugasi ...

Summary

In this video, the concept of conjugate acid-base pairs is explained using the Bronsted-Lowry theory. The video details several reactions, demonstrating how acids donate protons (H+) and bases accept them. Examples include reactions involving H2SO4, H2O, HCO3-, HNO2, and HCOOH, where acid-base conjugate pairs are identified. Key points are the transformation of acids into their conjugate bases upon proton donation, and vice versa, with the video concluding with the identification of correct conjugate acid-base pairs. This is essential knowledge for understanding acid-base reactions in chemistry.

Takeaways

• 😀 The Bronsted-Lowry theory defines acids as proton (H+) donors and bases as proton (H+) acceptors.
• 😀 H2SO4 acts as an acid in the first reaction by donating a proton (H+) to H2O, resulting in HSO4- as its conjugate base.
• 😀 H2O, acting as a base, accepts a proton from H2SO4 and becomes H3O+, which is the conjugate acid of water.
• 😀 Conjugate pairs are formed when acids donate protons and bases accept them, such as H2SO4 and HSO4-, or H2O and H3O+.
• 😀 In the second reaction, H2O donates a proton to HCO3-, making H2O the acid and OH- its conjugate base.
• 😀 HCO3- acts as a base by accepting a proton from H2O and becomes H2CO3, which is the conjugate acid of bicarbonate.
• 😀 The conjugate acid-base pairs in the second reaction are H2O and OH-, and HCO3- and H2CO3.
• 😀 In the third reaction, HNO2 donates a proton to HCOOH, making HNO2 the acid and NO2- its conjugate base.
• 😀 HCOOH acts as a base by accepting the proton from HNO2, becoming HCOOH2+, which is its conjugate acid.
• 😀 The conjugate acid-base pairs in the third reaction are HNO2 and NO2-, and HCOOH and HCOOH2+.
• 😀 The correct conjugate acid-base pair in the third reaction is HCOOH and HCOOH2+, as well as HNO2 and NO2-.

Q & A

What is the Bronsted-Lowry theory of acids and bases?

According to the Bronsted-Lowry theory, an acid is a substance that donates a proton (H+), and a base is a substance that accepts a proton (H+).

What happens to H2SO4 when it donates a proton to H2O?

When H2SO4 donates a proton to H2O, H2SO4 becomes HSO4-, which is its conjugate base, while H2O becomes H3O+, which is the conjugate acid.

What role does H2O play in the first reaction mentioned in the script?

In the first reaction, H2O acts as a base because it accepts a proton (H+) from H2SO4, turning into H3O+.

What is the conjugate acid of H2SO4 in the reaction with H2O?

The conjugate acid of H2SO4 in this reaction is H3O+, which is formed when H2O accepts a proton from H2SO4.

What is the conjugate base of H2SO4 in this reaction?

The conjugate base of H2SO4 is HSO4-, which is formed when H2SO4 donates a proton to H2O.

What happens when H2O donates a proton to HCO3- in the second reaction?

When H2O donates a proton to HCO3-, H2O becomes OH-, and HCO3- becomes H2CO3.

What is the conjugate acid and conjugate base in the second reaction?

In the second reaction, H2O is the acid because it donates a proton, and its conjugate base is OH-. HCO3- is the base because it accepts the proton, and its conjugate acid is H2CO3.

How does the concept of conjugate acid-base pairs apply to HNO2 and HCOOH?

In the reaction between HNO2 and HCOOH, HNO2 acts as an acid by donating a proton to HCOOH, forming NO2- as its conjugate base. HCOOH, receiving the proton, becomes HCOOH2+, which is its conjugate acid.

What are the conjugate acid-base pairs in the reaction between HNO2 and HCOOH?

The conjugate acid-base pairs in this reaction are: HNO2 (acid) and NO2- (conjugate base), and HCOOH (base) and HCOOH2+ (conjugate acid).

What is the correct pair of conjugate acid and base for this reaction, according to the script?

The correct conjugate acid-base pairs in this reaction are HCOOH and HCOOH2+, and HNO2 and NO2-, making the correct answer 'E'.