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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Fluorine</title>
+    <script src="chem1.js" defer></script>
+    <meta name="Keywords" content="exercises,  balancing,  chemistry, equations, fluorine, ozone, potassium-dichromate, potassium permanganate, preparation ">
+    <meta name="author" content="Jiban Majumdar">
+    <link rel="stylesheet" href="mystyle.css">
+</head>
+<body>
+    <table align="center" style="width: 100%; border: 1px solid;">
+
+<tr>
+<td><a href="index.html">Home Page</a></td>
+<td><a href="equations.html">Intermediate Equations</a></td>
+<td><a href="assorted.html">Assorted Equations</a></td>
+<td><a href="Ozone.html">Ozone</a></td>
+<td><a href="Potassium Dichromate.html">Potassium Dichromate</a></td>
+<td><a href="Potassium Permanganate.html">Potassium Permanganate</a></td>
+<td><a href="Hydrogen Peroxide.html">Hydrogen Peroxide</a></td>
+</tr>
+</table>
+
+<h1 style="text-align:center;text-align:top;"> Fluorine</h1>
+
+<h2>Practise balancing equations: </h2> <h3>Direction:</h3> <ul><li>In  the following equations you will see a blank box before the symbol of each compound and element. Enter the lowest possible number in each box, or leave the box blank if you think the chemical needn't have a number (i.e. the number is equivalent to '1').</li> 
+<li>When you think the equation is balanced, click on the small button <span style= "color:blue;"><b>"Check answer"</b></span> that appears below it.</li> <lI>If your equation is incorrect, then click the button <span style= "color:blue;"><b> "Reset"</b></span> and try balancing the  equation again.</li> <li>In case you are in a hurry or are unable to balance, then click the button <span style= "color:blue;"><b>"Show answer."</b></span></li></ul>
+ <h3>Note:</h3> If you get no response after clicking 'Check answer' or 'Show answer', your browser has disabled to run this program. Enable it by clicking below the 'address bar' and follow the instructions.
+
+
+<form name=equations>
+<ul>
+  <li>
+  <h4>Preparation of Fluorine:</h4>
+  <ul><li>Fluorine is prepared by the electrolysis of fused 
+    Potassium hydrogen fluoride:</li> 
+    <p style="font-size:115%; text-align:center;">KHF<sub>2</sub> &#8594
+    K<sup>+</sup> + H<sup>+</sup> + 2F<sup>-</sup></p>
+    
+    <h4 style=" text-align:center;">At Cathode:</h4>
+    <p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align:center" 
+    size=1 name=q1a></input>H<sup>+</sup> + <input 
+    style="font-size: 16px; text-align:center" size=1 name=q1b></input> 
+    e<sup>-</sup> &#8594<input 
+    style="font-size: 16px; text-align:center" size=1 name=q1c></input> 
+    H<sub>2</sub></p> 
+    <p style="font-size:115%; text-align:center;"><input onclick="check(1,'Preparation of Fluorine',2,2,1,0,0,0,'H<sup>+</sup> + e<sup>-</sup>',' H<sub>2</sub>');" type= "button" value="Check answer"></input>&nbsp;&nbsp;&nbsp;&nbsp; 
+<input type="reset" value="Reset"></input>&nbsp;&nbsp;&nbsp;&nbsp; <input onclick="show(1,'Preparation of Fluorine',2,2,1,0,0,0,'2H<sup>+</sup> + 2e<sup>-</sup>',' H<sub>2</sub>');" type="button" value="Show answer"></input> 
+    </p>
+  
+  
+    <h4 style=" text-align:center;">At Anode:</h4>
+    <p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align:center" 
+    size=1 name=q2a></input>F<sup>-</sup> - <input 
+    style="font-size: 16px; text-align:center" size=1 name=q2b></input> 
+    e<sup>-</sup> &#8594<input 
+    style="font-size: 16px; text-align:center" size=1 name=q2c></input> 
+    F<sub>2</sub></p> 
+    <p style="font-size:115%; text-align:center;"><input onclick="check(2,'Preparation of Fluorine',2,2,1,0,0,0,'F<sup>-</sup> - e<sup>-</sup>',' F<sub>2</sub>');" type="button" value="Check answer"></input>&nbsp;&nbsp;&nbsp;&nbsp; 
+<input type="reset" value="Reset"></input>&nbsp;&nbsp;&nbsp;&nbsp; <input onclick="show(2,'Preparation of Fluorine',2,2,1,0,0,0,'2F<sup>-</sup> - 2e<sup>-</sup>',' F<sub>2</sub>');" type="button" value="Show answer"></input> 
+    </p></ul>
+  </li></ul>
+
+<ul>
+  <li>
+  <h4>Reactions of Fluorine:</h4>
+  
+   <ol> <li>Hydrogen sulphide gas burns in Fluorine gas to form Sulphur hexafluoride 
+    and Hydrogen Fluoride:</li> 
+    <p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align:center" 
+    size=1 name=q3a></input> H<sub>2</sub>S + <input 
+    style="font-size: 16px; text-align:center" size=1 name=q3b></input> 
+    F<sub>2</sub>&#8594<input 
+    style="font-size: 16px; text-align:center" size=1 name=q3c></input> 
+    SF<sub>6</sub> + <input style="font-size: 16px; text-align:center" size=1 
+    name=q3d></input> HF</p> 
+
+    <p style="font-size:115%; text-align:center;"><input onclick="check(3,'Reactions of Fluorine',1,4,1,2,0,0,'H<sub>2</sub>S + F<sub>2</sub>','SF<sub>6</sub> + HF');" type="button" value="Check answer"></input>&nbsp;&nbsp;&nbsp;&nbsp; 
+<input type="reset" value="Reset"></input>&nbsp;&nbsp;&nbsp;&nbsp; <input onclick="show(3,'Reactions of Fluorine',1,4,1,2,0,0,'H<sub>2</sub>S + 4F<sub>2</sub>','SF<sub>6</sub> + 2HF');" type="button" value="Show answer"></input>
+    </p>
+  
+
+<p></p>
+
+  <li>Fluorine reacts with Hydrogen gas explosively even in dark to form 
+  Hydrogen Fluoride gas:</li> 
+  <p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align:center" 
+  size=1 name=q4a></input> F<sub>2</sub> + <input 
+  style="font-size: 16px; text-align:center" size=1 name=q4b></input> 
+  H<sub>2</sub> &#8594 <input 
+  style="font-size: 16px; text-align:center" size=1 name=q4c></input>HF</p>
+  <p style="font-size:115%; text-align:center;"><input onclick="check(4,'Reactions of Fluorine',1,1,2,0,0,0,'F<sub>2</sub> + H<sub>2</sub>','HF');" type="button" value="Check answer"></input>&nbsp;&nbsp;&nbsp;&nbsp; 
+<input type="reset" value="Reset"></input>&nbsp;&nbsp;&nbsp;&nbsp;<input onclick="show(4,'Reactions of Fluorine',1,1,2,0,0,0,'F<sub>2</sub> + H<sub>2</sub>','  2 HF');" type="button" value="Show answer"></input> 
+  </p>
+<p></p>
+
+
+  <li>Fluorine fumes in moist air and reacts with water to form Oxygen and 
+  Hydrogen fluoride:</li> 
+  
+  <p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align:center" 
+  size=1 name=q5a></input> F<sub>2</sub> + <input 
+  style="font-size: 16px; text-align:center" size=1 name=q5b></input> 
+  H<sub>2</sub>O &#8594<input 
+  style="font-size: 16px; text-align:center" size=1 name=q5c></input> HF + 
+  <input style="font-size: 16px; text-align:center" size=1 name=q5d></input> 
+  O<sub>2</sub></p> 
+  <p style="font-size:115%; text-align:center;"><input onclick="check(5,'Reactions of Fluorine',2,2,4,1,0,0,'F<sub>2</sub>  + H<sub>2</sub>O','HF + O<sub>2</sub>');" type="button" value="Check answer"></input>&nbsp;&nbsp;&nbsp;&nbsp; 
+<input type="reset" value="Reset"></input>&nbsp;&nbsp;&nbsp;&nbsp; <input onclick="show(5,'Reactions of Fluorine',2,2,4,1,0,0,'2F<sub>2</sub>  + 2H<sub>2</sub>O',' 4HF + O<sub>2</sub>');" type="button" value="Show answer"></input> 
+  </p>
+<p></p>
+
+
+  <li>Fluorine reacts with cold dilute sodium hydroxide to form sodium Fluoride, 
+  Oxygen diFluoride and water:</li> 
+  <p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align:center" 
+  size=1 name=q6a></input> F<sub>2</sub> + <input 
+  style="font-size: 16px; text-align:center" size=1 name=q6b></input> NaOH 
+  &#8594<input style="font-size: 16px; text-align:center" 
+  size=1 name=q6c></input> NaF + <input 
+  style="font-size: 16px; text-align:center" size=1 name=q6d></input> 
+  OF<sub>2</sub> + <input style="font-size: 16px; text-align:center" size=1 
+  name=q6e></input> H<sub>2</sub>O </p>
+  <p style="font-size:115%; text-align:center;"><input onclick="check(6,'Reactions of Fluorine',2,2,2,1,1,0,'F<sub>2</sub> + NaOH','NaF + OF<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Check answer"></input>&nbsp;&nbsp;&nbsp;&nbsp; 
+<input type="reset" value="Reset"></input>&nbsp;&nbsp;&nbsp;&nbsp; <input onclick="show(6,'Reactions of Fluorine',2,2,2,1,1,0,'2F<sub>2</sub> + 2NaOH',' 2NaF + OF<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Show answer"></input> 
+  </p>
+<p></p>
+
+
+  <li>Fluorine reacts with hot concentrated sodium hydroxide to form sodium 
+  Fluoride, oxygen and water:</Li> 
+  <p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align:center" 
+  size=1 name=q7a></input> F<sub>2</sub> + <input 
+  style="font-size: 16px; text-align:center" size=1 name=q7b></input> NaOH 
+  &#8594<input style="font-size: 16px; text-align:center" 
+  size=1 name=q7c></input> NaF + <input 
+  style="font-size: 16px; text-align:center" size=1 name=q7d></input> 
+  O<sub>2</sub> + <input style="font-size: 16px; text-align:center" size=1 
+  name=q7e></input> H<sub>2</sub>O</p> 
+  <p style="font-size:115%; text-align:center;"><input onclick="check(7,'Reactions of Fluorine',2,4,4,1,2,0,'F<sub>2</sub> + NaOH','NaF + O<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Check answer"></input>&nbsp;&nbsp;&nbsp;&nbsp; 
+<input type="reset" value="Reset"></input>&nbsp;&nbsp;&nbsp;&nbsp; <input onclick="show(7,'Reactions of Fluorine',2,4,4,1,2,0,'2F<sub>2</sub> + 4NaOH',' 4NaF + O<sub>2</sub> + 2H<sub>2</sub>O');" type="button" value="Show answer"></input> 
+  </p>
+<p ></p>
+
+<li>Fluorine oxidizes Potassium chlorate ( KClO<sub>3</sub>) into Potassium perchlorate (KClO<sub>4</sub>):</li>
+<p style="font-size:115%; text-align:center;"><input style="font-size 16px; text-align: center" 
+  size=1 name=q8a></input> F<sub>2</sub> + <input style="font-size 16px; text-align:center" size=1 name=q8b></input> KClO<sub>3</sub> + <input style="font-size 16px; text-align:center" size=1 name=q8c></input> H<sub>2</sub>O &#8594 <input style="font-size 16px; text-align: center" size=1 name=q8d></input> KClO<sub>4</sub> + <input style="font-size16px;text-align:center"size=1 name=q8e></input> HF</p> 
+  <p style="font-size:115%; text-align:center;">
+<input onclick="check(8,'Reactions of Fluorine',1,1,1,1,2,0,'F<sub>2</sub> + KClO<sub>3</sub> + H<sub>2</sub>O','KClO<sub>4</sub> + HF');" type="button" value="Check answer"></input>&nbsp;&nbsp;&nbsp;&nbsp; <input type="reset" value="Reset"></input> &nbsp;&nbsp;&nbsp; <input onclick="show(8,'Reactions of Fluorine',1,1,1,1,2,0,'F<sub>2</sub> + KClO<sub>3</sub> + H<sub>2</sub>O','KClO<sub>4</sub> + 2HF');" type="button" value="Show answer"></input></p>
+</ol></ul></form>
+<p></p>
+
+<table align = "center" width="100%" border="1">
+<tr>
+<td><a href="index.html">Home Page</a></td>
+<td><a href="equations.html">Intermediate Equations</a></td>
+<td><a href="assorted.html">Assorted Equations</a></td>
+<td><a href="Ozone.html">Ozone</a></td>
+<td><a href="Potassium Dichromate.html">Potassium Dichromate</a></td>
+<td><a href="Potassium Permanganate.html">Potassium Permanganate</a></td>
+<td><a href="Hydrogen Peroxide.html">Hydrogen Peroxide</a></td>	
+
+</tr>
+</table>
+
+<p></p>
+<p></p>
+
+<address>For feedback, please e-mail&nbsp; to:<a 
+href="mailto:jibanmajumdar@gmail.com">jibanmajumdar@gmail.com</a>
+</address>
+</body>
+</html>
