Integrated Rate Equations

The video tutorial explains zero and first order reactions, their rate equations, and the concept of half-life. It covers the decomposition of ammonia and the hydrogenation of ethene, illustrating how reaction rates are affected by reactant concentration. The tutorial also introduces pseudo first order reactions, using the hydrolysis of methyl acetate as an example.

What is the characteristic of a zero order reaction regarding the concentration of the reactant?

• The rate increases with concentration.

• The rate decreases with concentration.

• The rate is independent of concentration.

• The rate fluctuates with concentration.

In the decomposition of ammonia on a platinum surface, what role does platinum play?

• Inhibitor

• Catalyst

• Product

• Reactant

Which graph represents a zero order reaction?

• A curve with a decreasing slope

• A straight line with a positive slope

• A straight line with a negative slope

• A curve with an increasing slope

In a first order reaction, what happens to the rate as the concentration of the reactant decreases?

• The rate becomes zero.

• The rate decreases.

• The rate remains constant.

• The rate increases.

What is the relationship between the half-life and concentration in a first order reaction?

• Directly proportional

• Inversely proportional

• Independent

• Exponentially related

For a zero order reaction, how does the half-life change as the reaction progresses?

• It remains constant.

• It decreases.

• It increases.

• It becomes zero.

What is the half-life equation for a first order reaction?

• t1/2 = k/0.693

• t1/2 = 0.693/k

• t1/2 = R0/2k

• t1/2 = 2.303/k

In a pseudo first order reaction, what is the role of the reactant used in excess?

• It acts as a product.

• It acts as a catalyst.

• It acts as a solvent.

• It acts as an inhibitor.

What is a pseudo first order reaction?

• A reaction that appears to be third order

• A reaction that appears to be second order

• A reaction that appears to be zero order

• A reaction that appears to be first order due to excess reactant

In the hydrolysis of methyl acetate, why is the reaction considered pseudo first order?

• Because the products are in excess

• Because both reactants are in equal amounts

• Because water is in excess

• Because methyl acetate is in excess