Chemical Kinetics (Module 9)

Question 1

The study of the rate of chemical change and the way this is influenced by conditions of concentration of the reactants, products, and chemical species that may be present, and by factors such as solvent, pressure, and temperature.

Answer 1

reaction kinetics

Question 2

study of the rate of a chemical reaction

Answer 2

chemical kinetics

Question 3

The speed with which the reaction occurs

Answer 3

reaction / degradation rate

Question 4

importance of knowledge in chemical kinetics

Answer 4

• Maintaining proper storage conditions of drug products
• Providing beyond use date of prescriptions
• Preparation and storage of sterile products
• Ensuring the patient receives the correct dose
• The length of time a drug remains stable
  Identifying expiration dating or determination of shelf-life

Question 5

(effect of temperature on reaction rate) rate of chemical reaction generally ____ on increasing the temperature

Answer 5

increases

Question 6

(nature of reactants) reactions involving _________ including the proton transfer reactions are usually ______.

Answer 6

polar and ionic substances, very fast

Question 7

(nature of reactants) on the other hand, the reaction in which bonds are _____, or electrons transferred is _____

Answer 7

rearranged, slow

Question 8

(nature of reactants) are slow compared to the ionic substance

Answer 8

oxidation-reduction reactions

Question 9

(nature of reactants) are relatively much slower

Answer 9

substitution reactions

Question 10

(pH of the medium) the rate of a reaction taking place in aqueous solution often depends upon the ____________. Some reactions become fast on increasing the H+ ion concentration while some become slow.

Answer 10

ion concentration

Question 11

(concentration of reactants) he rate of a chemical reaction is _______ to the concentration of the reactants means the rate of reaction decreases with a decrease in concentration.

Answer 11

directly proportional

Question 12

(surface area of the reactant) the larger the surface are, the probability of collisions _____ and thus rate of reaction ______

Answer 12

increases

Question 13

(presence of catalyst) the greater the decrease in the activation energy caused by the catalyst, the higher will be the reaction rate. In the presence of a catalyst, the reaction follows a path of lower activation energy.

Answer 13

increase

Question 14

(effect of sunlight) there are many chemical reactions whose rate is influenced by radiations particularly by ultraviolet and visible light. Such reactions are called

Answer 14

photochemical reactions