Expt No. [C]moldm [D]moldm Initial Rate moldm S 0.15 0.15 0.30 0.15 3. 0.15 0.30 Deduce the: 31. order of the reaction with respect to [C) A) 0 B) 1 C) 2 D) 4 32. order of the reaction with respect to (D] A) 1 B) 2 C) 4 D) 0 33. rate expression of the reaction A) Rate = K[Cj° [D]' B) Rate = K[C)° [DF C) Rate = K[CJ IDF D) Rate = K[C] [D] !3! 142
Electronic Effects
The effect of electrons that are located in the chemical bonds within the atoms of the molecule is termed an electronic effect. The electronic effect is also explained as the effect through which the reactivity of the compound in one portion is controlled by the electron repulsion or attraction producing in another portion of the molecule.
Drawing Resonance Forms
In organic chemistry, resonance may be a mental exercise that illustrates the delocalization of electrons inside molecules within the valence bond theory of octet bonding. It entails creating several Lewis structures that, when combined, reflect the molecule's entire electronic structure. One Lewis diagram cannot explain the bonding (lone pair, double bond, octet) elaborately. A hybrid describes a combination of possible resonance structures that represents the entire delocalization of electrons within the molecule.
Using Molecular Structure To Predict Equilibrium
Equilibrium does not always imply an equal presence of reactants and products. This signifies that the reaction reaches a point when reactant and product quantities remain constant as the rate of forward and backward reaction is the same. Molecular structures of various compounds can help in predicting equilibrium.
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Answer Q 31, 32 & 33
![Questions 37 - 39
Given the reaction P +O C.
From kinetic studies, the following dala was
obtained
Quastions 31- 34
The reaction between two species C and D in the
gaseous phase was investigated and the
following data collected.
Expt No. [C]moldm [D]moldm Initial
Expt No. Conc, of P Conc. of Q Rate of
moldm moldm
Rate
reaction
moldm S
0.15
moldm s
0,15
1.
0.5
0,5
1.0
0,30
0.15
(i)
0.5
3.6
4.
7.2
(i)
(ili)
0.15
0.30
1.0
0.5
3.6
Deduce the:
31 order of the reaction with respect to [CI
Give the partial order of the reaction with
respect to
37. P.
A) O
A) 0
B) 1 C) 2
D) 4
29 order of the reaction with respect to iDI
B) 1 C) 2
D) 3
A) 1
B) 2
C) 4
D) 0
38. Q:
A) 1
B) 4 C) 0
D) 2
33. rate expression of the reaction
A) Rate = K[Cj° [D]
B) Rate = K[C) [D
C) Rate = K[CJ [DP
D) Rate = K[Cj (D]
39. The rate expression for the reaction is
A) Rate = K[PP
B) Rate = K[P]
C) Rate = K[PI
D) Rate = K[P[Q]
34. overall order of the reaction
B) 2
A) 1
C) 3
D) 4
Question 40 - 42
Questions 35 and 36
The data below was obtained at a certain
Mangesium reacts with dilute hydrochloric acid
temperature for the kinetic study of a reaction
between two substances R and S.
according to the equation
Mg(s) + 21HCI(aq)
H.(g) + MgCl, (aq)
Expt No. Initial
Initial
35. Suggest two suitable methods by which the
rate of this reaction may be determined
A) volume of gas evolved and colorimetry
B) pressure of gas evolved and dilatometry
C) titrimetry and colorimetry
D) titrimetry and volune of gas evolved.
concentrations
rate of reaction
in moldm
moldm s
R
0.25
0 50
1.0x10
4.0x10
0.25
2
0.25
0.50
3.
0.50
8.0x102
Deduce the order of the reaction with respect to:
36. Two factors that would affect the rate of this
reaction are;
40. R: A) 2 B) 1 C) 4 D) 0
A) concentration and catalyst
B) surface area of Mg and catalyst.
C) concentration and surface area of Mg
D) temperature and pressure of HCI
41. S: A) 2 B) 4 C) 1 D) 3
42. How would the rate constant for the reaction
change if the reaction occured at a lower
temperature?
A) rate constant will be increased
B) rate constant will remain the sarme
C) rate constant will be decieased
D) none of the above.
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