17 files changed, 159 insertions, 0 deletions

diff --git a/1427/CH6/EX6.1/6_1.sce b/1427/CH6/EX6.1/6_1.sce
new file mode 100644
index 000000000..83cb19d41
--- /dev/null
+++ b/1427/CH6/EX6.1/6_1.sce
@@ -0,0 +1,7 @@
+//ques-6.1

+//Calculating reduction potential for a half cell

+clc

+e1=-2.48;//reduction of Ce(4+) (in V)

+e2=1.61;//reduction of Ce(3+) (in V)

+E=e1+e2;

+printf("The reduction potential of the half-cell is %.2f V.",E);

diff --git a/1427/CH6/EX6.10/6_10.sce b/1427/CH6/EX6.10/6_10.sce
new file mode 100644
index 000000000..0da6133b6
--- /dev/null
+++ b/1427/CH6/EX6.10/6_10.sce
@@ -0,0 +1,7 @@
+//ques-6.10

+//Calculating pH of a solution

+clc

+E=0.48;//emf of the cell (in V)

+Es1=0.34;//standard emf of copper (in V)

+pH=(E-Es1)/0.0592;

+printf("The pH of the solution is %.3f.",pH);

diff --git a/1427/CH6/EX6.11/6_11.sce b/1427/CH6/EX6.11/6_11.sce
new file mode 100644
index 000000000..9127bdfdb
--- /dev/null
+++ b/1427/CH6/EX6.11/6_11.sce
@@ -0,0 +1,7 @@
+//ques-6.11

+//Calculating emf of a concentration cell

+clc

+C2=0.1; C1=0.01;//concentration of Zn(2+) ion (in M)

+n=2;//number of electrons

+E=(0.0592/n)*log10(C2/C1);

+printf("The emf required is %.4f V.",E);

diff --git a/1427/CH6/EX6.12/6_12.sce b/1427/CH6/EX6.12/6_12.sce
new file mode 100644
index 000000000..6120a7a43
--- /dev/null
+++ b/1427/CH6/EX6.12/6_12.sce
@@ -0,0 +1,9 @@
+//ques-6.12

+//Calculating valency of mercurous ion

+clc

+C2=0.01; C1=0.001;//content of mercurous nitrate (in N)

+E=0.029;//emf of cell (in V)

+F=96500;

+T=273+18;//temperature (in K)

+n=(2.303*8.314*T*log10(C2/C1))/(E*F);

+printf("The valency of mercurous ion is %.0f.",n);

diff --git a/1427/CH6/EX6.13/6_13.sce b/1427/CH6/EX6.13/6_13.sce
new file mode 100644
index 000000000..c3023b459
--- /dev/null
+++ b/1427/CH6/EX6.13/6_13.sce
@@ -0,0 +1,10 @@
+//ques-6.13

+//Calculating emf of the cell and determining activity of HCl

+clc

+E=0.15;//emf of the cell (in V)

+e1=-0.2224;//emf for Ag/Ag+ (in V)

+E1=-e1;

+pH=(E+e1)/(-0.0592);

+//On taking antilog(pH)

+H=0.06;

+printf("The emf required is %.4f V and acticity of HCl is %.2f mol/L.",E1,H);

diff --git a/1427/CH6/EX6.14/6_14.sce b/1427/CH6/EX6.14/6_14.sce
new file mode 100644
index 000000000..4f26e7f41
--- /dev/null
+++ b/1427/CH6/EX6.14/6_14.sce
@@ -0,0 +1,13 @@
+//ques-6.14

+//Calculating equilibrium constant for a reaction at 300 K

+clc

+e1=0.355; e2=0.3704;//emf of reduction reactions (in V)

+T=300;//temperature (in K)

+E=e2-e1;

+n=1;//number of electrons used

+F=96500;//(in C)

+G=-n*F*E;

+z=-G/(2.303*8.314*T);

+//On solving, log10(K) = z

+K=1.8;

+printf("The equilibrium constant for the given reaction is %.1f.",K);

diff --git a/1427/CH6/EX6.15/6_15.sce b/1427/CH6/EX6.15/6_15.sce
new file mode 100644
index 000000000..81bde2bc4
--- /dev/null
+++ b/1427/CH6/EX6.15/6_15.sce
@@ -0,0 +1,11 @@
+//ques-6.15

+//Determining solubility of AgCl at 298 K

+clc

+e1=2.415;//emf of SCE (in V)

+e2=0.7991;//emf of Ag+/Ag (in V)

+E=0.2621;//emf of cell (in V)

+n=2;//number of electrons involved

+//On solving, E=e2-e1+(0.0592/n)*log10(C^2);

+C=10^-5;//concentration of Ag+

+Ksp=C*C;

+printf("The solubility of AgCl is 10^-10 mol^2/L^2.");

diff --git a/1427/CH6/EX6.16/6_16.sce b/1427/CH6/EX6.16/6_16.sce
new file mode 100644
index 000000000..e0f535fb4
--- /dev/null
+++ b/1427/CH6/EX6.16/6_16.sce
@@ -0,0 +1,8 @@
+//ques-6.16

+//Finding enthalpy change for a reaction

+clc

+G=-3.138;//free energy change (in kcal)

+T=300;//temperature (in K)

+z=-14.39;//free energy change w.r.t time (in cal/deg)

+H=G-T*(z/1000);

+printf("The enthalpy change required is %.3f kcal.",H);

diff --git a/1427/CH6/EX6.17/6_17.sce b/1427/CH6/EX6.17/6_17.sce
new file mode 100644
index 000000000..78cec5eca
--- /dev/null
+++ b/1427/CH6/EX6.17/6_17.sce
@@ -0,0 +1,11 @@
+//ques-6.17

+//Calculating heat of the reaction at 298 K

+clc 

+E1=0.6915;//emf of cell at 273 K (in V)

+E2=0.6753;//emf of cell at 298 K (in V)

+F=96500;//(in C)

+T=298;//temperature (in K)

+n=2;//electrons involved

+z=(E2-E1)/(T-273);//change in emf w.r.t temperature

+H=2*F*(T*z-E2);

+printf("The heat of the reaction is %.3f kJ.",H/1000);

diff --git a/1427/CH6/EX6.18/6_18.sce b/1427/CH6/EX6.18/6_18.sce
new file mode 100644
index 000000000..873b78832
--- /dev/null
+++ b/1427/CH6/EX6.18/6_18.sce
@@ -0,0 +1,12 @@
+//ques-6.18

+//Calculating enthalpy change and free energy change and entropy change for the given cell

+clc

+E1=0.6753;//emf at 298 K

+E2=0.6915;//emf at 273 K

+n=2;//electrons involved

+T=298;//temperature (in K)

+z=(E1-E2)/T;//change in emf w.r.t temperature

+H=n*96500*(-E1+T*z);

+G=-n*96500*E1;

+S=(H-G)/T;

+printf("The enthalpy change is %.3f kJ, free energy change is %.3f kJ and entropy change is %.2f J/K.",H/1000,G/1000,S);

diff --git a/1427/CH6/EX6.3/6_3.sce b/1427/CH6/EX6.3/6_3.sce
new file mode 100644
index 000000000..0ca073cc8
--- /dev/null
+++ b/1427/CH6/EX6.3/6_3.sce
@@ -0,0 +1,7 @@
+//ques-6.3

+//Calculating emf of a concentration cell

+clc

+C1=0.01; C2=0.1;//concentration of Zn(2+) ions (in M)

+n=2;//number of electrons

+E=(0.0592/n)*log10(C2/C1);

+printf("The emf of the given concentration cell is %.4f V.",E);

diff --git a/1427/CH6/EX6.4/6_4.sce b/1427/CH6/EX6.4/6_4.sce
new file mode 100644
index 000000000..ce44d837d
--- /dev/null
+++ b/1427/CH6/EX6.4/6_4.sce
@@ -0,0 +1,9 @@
+//ques-6.4

+//Calculating emf of a daniel cell

+clc

+Es=1.1;//standard potential of cell (in V)

+C1=0.001;//concentration of Zn(2+) (in M)

+C2=0.1;//concentration of Cu(2+) (in M)

+n=2;//number of electrons

+E=Es+(0.0592/n)*log10(C2/C1);

+printf("The emf of the given daniel cell is %.4f V.",E);

diff --git a/1427/CH6/EX6.5/6_5.sce b/1427/CH6/EX6.5/6_5.sce
new file mode 100644
index 000000000..731172c20
--- /dev/null
+++ b/1427/CH6/EX6.5/6_5.sce
@@ -0,0 +1,7 @@
+//ques-6.5

+//Finding emf of a given cell reaction

+clc

+e1=-0.76;//emf for Zn(2+)/Zn (in V)

+e2=0.34;//emf for Cu(2+)/Cu (in V)

+E=e2-e1;

+printf("The emf of the given cell is %.1f V.",E);

diff --git a/1427/CH6/EX6.6/6_6.sce b/1427/CH6/EX6.6/6_6.sce
new file mode 100644
index 000000000..875745e38
--- /dev/null
+++ b/1427/CH6/EX6.6/6_6.sce
@@ -0,0 +1,11 @@
+//ques-6.6

+//Calculating concentration of nickel ions in the cell

+clc

+e1=-0.25;//emf for Ni(2+)/Ni (in V)

+e2=0.34;//emf for Cu(2+)/Cu (in V)

+C1=0.75;//concentration of Cu(2+) (in M)

+E=0.601;//emf of cell (in V)

+n=2;//number of electrons

+//On solving, E = e2-e1+(0.0592/n)*log(C1/C2)

+C2=C1/2.3529;//concentration of Ni(2+) (in M)

+printf("The concentration of nickel ions is %.4f M.",C2);

diff --git a/1427/CH6/EX6.7/6_7.sce b/1427/CH6/EX6.7/6_7.sce
new file mode 100644
index 000000000..ac8ec62d8
--- /dev/null
+++ b/1427/CH6/EX6.7/6_7.sce
@@ -0,0 +1,10 @@
+//ques-6.7

+//Calculating reduction potential for reduction of oxygen

+clc

+pH=7;

+p=0.2;//partial pressure of O2 (in bar)

+Es=1.229;//standard emf (in V)

+H=10^(-pH);//concentration of hydrogen ion

+n=2;//number of electrons

+E=Es-(0.0592/n)*log10(1/(H^2*sqrt(p)));

+printf("the reduction potential required is %.3f V.",E);

diff --git a/1427/CH6/EX6.8/6_8.sce b/1427/CH6/EX6.8/6_8.sce
new file mode 100644
index 000000000..d8d162576
--- /dev/null
+++ b/1427/CH6/EX6.8/6_8.sce
@@ -0,0 +1,10 @@
+//ques-6.8

+//Calculating standard emf and emf generated

+clc

+e1=1.7; e2=-0.31;//emfs of two half-cell reactions (in V)

+C1=0.1;//concentration of hydrogen ion (in M)

+C2=2;//concentration of sulphate ion (in M)

+n=2;//number of electrons

+Es=e1-e2;//standard emf (in V)

+E=Es-(0.0592/n)*log10(1/(C1^4*C2^2));

+printf("The standard emf is %.2f V and emf generated is %.2f V.",Es,E);

diff --git a/1427/CH6/EX6.9/6_9.sce b/1427/CH6/EX6.9/6_9.sce
new file mode 100644
index 000000000..c79a2d047
--- /dev/null
+++ b/1427/CH6/EX6.9/6_9.sce
@@ -0,0 +1,10 @@
+//ques-6.9

+//Calculating equilibrium constant of a reaction

+clc

+e1=0.77;//emf for Fe(3+)/Fe(2+) (in V)

+e2=0.8;//emf for Ag+/Ag (in V)

+Es=e2-e1;

+n=2;//number of electrons

+//On solving, log10(K) = (n*Es)/0.0592

+K=3.31;//(*10^26)

+printf("The value of equilibrium constant  is %.2f*10^26.",K);