Unit 15 Flashcards
(13 cards)
What is the definition of chemical equilibrium
The point at which booth the forward and reverse reactions in a chemical equation have equal reaction rates.
Does a chemical reaction actually stop once equilibrium is reached
No the reaction just slows down
Why do we ignore solids and liquids when using Le Chatelier’s principle
Because the concentration stays the same
Why are acid ionization reactions important in chemistry
They determine the strength of the acid
What is the range of the pH scale
0 to 14
Where does acid rain come from
Sulfur that is burned then goes into the atmosphere
For what value of K can we say the arrow goes left to right
K is large
For what value of K can we say the arrow goes right to left
K is small
For what value of K can we not determine the direction of the arrow
K is a medium number (close to 1)
If an equation has reached equilibrium and delta H is negative what will happen to the concentration of the reactants and the products if the temperature is raised
The concentration of the reactants will increase
The concentration of the products will decrease
If delta H is negative what will happen to the concentration of the reactants and products if the pressure is raised
Reactants will lower
Products will increase
What makes acids and bases have higher or lower ionization constant
The higher the ionization constant the stronger the acid/bases (very low or very high numbers)
In Le Chatelier’s principle the concentration of solids and liquids can not change but what can change
The amount of the solid or liquid
