Question

Pre-Lab Study Questions 1. What factors increase the rate of a chemical reaction? 2. When is equilibrium established in a reversible reaction? 3. How does a system at equilibrium respond to the addition of more reactant? 4. How does a system at equilibrium respond to the addition of more product? 5. In Part C, we look at the following reaction: Fe (aq)+SCN" (aq) P FSCN- (aq)

Answer 1

Factors affecting rate of reaction are

Temperature: As temperature increases rate of reaction increases
Nature of of reactant : Gaseous reactants usually show faster rate. Also when reactants
are in aqueous form reaction rate is more
Concentration of reactant :Rate increases when concentration of reactants increases
catalyst Presence of catalyst increase rate of reaction
pressure of gaseous reactant : Increasing pressure of gaseous reactant
increases rate of reaction
**************
2) When rate of forward reaction is equal to rate of reverse reaction
the reversible reaction is said to be in equilibrium
*****
3)
According to Le-Chatlier principle ,to a system at equilibrium when more reactants are
added ,the system will get disturbed. In order to attain equilibrium state again
the system will adjust itself. So the forward reaction rate will increase
which will help to reduce concentration of reactant added. Thus products
favored
***
4)
When product is added to equilibrium system,the system will try to cancel this
change by speeding up reverse reaction rate. Hence It is reactant favored
***