Predicting The Position of Equilibrium Using pKa values - Acids and Bases

TL;DR

Learn how to predict the products and determine the position of equilibrium in acid-base reactions based on pKa values.

Transcript

42 consider the reaction shown below predict the products of the reaction now we're going to work on other reaction examples not just this one but I wanted to do it one at a time so how can we find the products of this reaction first we need to determine which molecule is going to be the broad Solari acid and which one is going to be the bronzalari... Read More

Key Insights

• ⚾ Predicting acid-base reactions involves determining the bronsted acid and base based on their pKa values.
• 💐 Electrons flow towards the more electronegative element when a covalent bond breaks.
• 🧘 The position of equilibrium in acid-base reactions is determined by comparing the pKa values of the bronsted acid and the conjugate acid.
• 💁 Acid-base reactions tend to favor the formation of more stable and less reactive products.
• ☠️ Equilibrium in acid-base reactions is indicated by the forward and reverse reactions occurring at equal rates.
• 💘 The size of the curve arrows in an acid-base reaction indicates the position of equilibrium.
• ⚾ Acid-base reactions involve the transfer of protons between molecules.

Questions & Answers

Q: How do you determine which molecule is the bronsted acid and bronsted base in an acid-base reaction?

The molecule with the lower pKa value is the bronsted acid, while the one with the higher pKa value is the bronsted base. The pKa value indicates the strength of the acid.

Q: Why do the electrons go towards the element that is more electronegative?

Electrons in a covalent bond tend to be attracted more towards the more electronegative atom. Therefore, when the bond breaks, the electrons go towards the more electronegative element.

Q: How do you determine if an acid-base reaction is product favored or reactant favored?

By comparing the pKa values of the bronsted acid and the conjugate acid, you can determine which acid is stronger. The reaction will favor the side with the weaker acid, which is the more stable and less reactive product.

Q: Can you explain the concept of equilibrium in acid-base reactions?

Equilibrium refers to the state in which the forward and reverse reactions occur at equal rates. In acid-base reactions, the position of equilibrium is determined by the stability of the products, with the reaction favoring the formation of more stable acids.

Summary & Key Takeaways

• Acid-base reactions can be predicted by determining which molecule is the bronsted acid and which is the bronsted base based on their pKa values.

• The flow of electrons can be shown with curve arrows to predict the products.

• The position of equilibrium in the reaction can be determined by comparing the pKa values of the bronsted acid and the conjugate acid.