From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 1478/CH2/EX2.18.21/2_18_21.sce | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100755 1478/CH2/EX2.18.21/2_18_21.sce

(limited to '1478/CH2/EX2.18.21')

diff --git a/1478/CH2/EX2.18.21/2_18_21.sce b/1478/CH2/EX2.18.21/2_18_21.sce
new file mode 100755
index 000000000..8d238b60f
--- /dev/null
+++ b/1478/CH2/EX2.18.21/2_18_21.sce
@@ -0,0 +1,36 @@
+//water and its treatment//
+//example 2.18.21//
+clc    
+Purity_Lime=.85
+Purity_soda=.95
+W1=55.5;//amount of CaCl2 in ppm//
+W2=20;//amount of SiO2 in ppm//
+W3=12.6;//amount of  NaHCO3 in ppm//
+W4=250;//amount of KCl in ppm//
+W5=48;//amount of MgSO4 in ppm//
+W6=2.2;//amount of CO2 in ppm//
+W7=43.8;//amount of Mg(HCO3)2 in ppm//
+W8=2;//amount of Fe++ in ppm//
+W9=10;//amount of AlCl3 in ppm//
+M1=100/111;//multiplication factor of CaCl2//
+M3=100/(84*2);//multiplication factor of NaHCO3//
+M5=100/120;//multiplication factor of MgSO4//
+M6=100/44;//multiplication factor of CO2//
+M7=100/146;//multiplication factor of Mg(HCO3)2//
+M8=100/55.8;//multiplication factor of Fe++//
+M9=100/133.42;//multiplication factor of AlCl3//
+P1=W1*M1;//in terms of CaCO3//L
+P3=W3*M3;//in terms of CaCO3//+L and -S 
+P5=W5*M5;//in terms of CaCO3//L+S
+P6=W6*M6;//in terms of CaCO3//L
+P7=W7*M7;//in terms of CaCO3//L
+P8=W8*M8;//in terms of CaCO3//L+S
+P9=W9*M9;//in terms of CaCO3//L+S
+printf ("We do not take SiO2 and KCl since they do not react with lime/soda");
+V=50000;//volume of water in litres//
+L=0.74*(P3+P5+P6+P7*2+P8+P9)*V/Purity_Lime;//lime required in mg//
+L=L/10^6;
+printf("\nLime required is %.3fkg",L);
+S=1.06*(P1-P3+P5+P8+P9)*V/Purity_soda;//soda required in mg//
+S=S/10^6;
+printf("\nSoda required is %.4fkg",S)
-- 
cgit