Unit 3 Oysters_ Mid-Unit Review Guide

What defines an acid in relation to a base?

An acid is defined as a H+ donor, while a base is defined as a H+ acceptor.

What is the chemical equation for the formation of carbonic acid from CO2 and water?

CO2(g) + H2O(l) → H2CO3(aq) (Carbonic Acid)

What is produced when carbonic acid interacts with water?

H2CO3(aq) + H2O(l) → HCO3-(aq) + H3O+(aq)

What is the chemical equation for oyster shell formation?

CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + 2 NaCl(aq)

How does increased acidity affect oyster shell formation?

Increased acidity can lead to shell deconstruction, as shown by the equation: H3O+(aq) → HCl(aq) + CaCO3(s) ⇌ H2O(l) + CO2(g) + CaCl2(aq).

What principle explains equilibrium shifts in chemical reactions?

Le Chatelier's Principle.

What happens to equilibrium when there is an increase in reactant concentration?

There is a shift towards the products side to counteract the change.

What does adding heat do to an exothermic reaction according to Le Chatelier's Principle?

It shifts the equilibrium towards the reactants (R ⇌ P + Heat).

What is indicated by '(aq)' in a chemical equation?

It signifies that the substance is in an aqueous solution, meaning it is dissolved in water.

What does it mean when there are no shifts in equilibrium?

It indicates that the conditions of the system are at balance, and there are no changes in concentration or other stress applied.