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<!DOCTYPE html>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Sulphur Dioxide</title>
<script src="chem1.js" defer></script>
<script src="timer.js" defer></script>
<meta name="Keywords" content="exercises, balancing, chemistry, equations, hydrogen-chloride, ammonia, nitric-acid, nitrates, sulphur-dioxide, hydrogen-sulphide, sodium-hydroxide, sulphuric-acid, preparation ">
<meta name="author" content="Jiban Majumdar">
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<td><a href="index.html">Home Page</a></td>
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<h1 style="text-align:center;">Sulphur Dioxide</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>
<li>If you want to know the time taken (minutes:seconds) to balance a chemical equation, you click the <span style="color:blue;"><b>"Start"</b></span> button and after balancing the equation, click the <span style="color:blue;"><b>"Stop"</b></span>button. Once, you have noted the time, click the <span style="color:blue;"><b>"Reset Timer"</b></span> button.
</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">
<h4>Preparation of Sulphur dioxide:</h4>
1. Sodium Sulphite reacts with dilute Hydrochloric acid to form Sodium choride, Sulphur dioxide gas and water:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center;"
size=1 name=q1a> Na<sub>2</sub>SO<sub>3</sub> + <input style="font-size: 16px; text-align: center;" size=1 name=q1b> HCl → <input style="font-size: 16px; text-align:center;" size=1 name=q1c> NaCl+ <input style="font-size: 16px; text-align:center;" size=1 name=q1d> SO<sub>2</sub> +<input style="font-size: 16px; text-align:center;" size=1 name=q1e>H<sub>2</sub>O </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(1,'Preparation of Sulphur dioxide',1,2,2,1,1,0,'Na<sub>2SO<sub>3</sub> + HCl','NaCl + SO<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(1,'Preparation of Sulphur dioxide',1,2,2,1,1,0,'Na<sub>2</sub>SO<sub>3</sub> + 2HCl','2NaCl + SO<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Show answer"> </p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer1">00:00</span>
<button type="button" onclick="startTimer('timer1')">Start</button>
<button type="button" onclick="stopTimer('timer1')">Stop</button>
<button type="button" onclick="resetTimer('timer1')">Reset Timer</button>
</p>
<p></p>
2.Sodium Sulphite reacts with dilute Sulphuric acid to form Sodium sulphate, Sulphur dioxide gas and water:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center;"
size=1 name=q2a> Na<sub>2</sub>SO<sub>3</sub> + <input style="font-size: 16px; text-align: center;" size=1 name=q2b> H<sub>2</sub>SO<sub>4</sub>→ <input style="font-size: 16px; text-align: center;" size=1 name=q2c> Na<sub>2</sub>SO<sub>4</sub>+ <input style="font-size: 16px; text-align: center" size=1 name=q2d> SO<sub>2</sub> +<input style="font-size: 16px; text-align: center;" size=1 name=q2e>H<sub>2</sub>O </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(2,'Preparation of Sulphur dioxide',1,1,1,1,1,0,'Na<sub>2</sub>SO<sub>3</sub> + H<sub>2</sub>SO<sub>4</sub>','Na<sub>2</sub>SO<sub>4</sub> + SO<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(2,'Preparation of Sulphur dioxide',1,1,1,1,1,0,'Na<sub>2</sub>SO<sub>3</sub> + H<sub>2</sub>SO<sub>4</sub>','Na<sub>2</sub>SO<sub>4</sub>+ SO<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Show answer"> </p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer2">00:00</span>
<button type="button" onclick="startTimer('timer2')">Start</button>
<button type="button" onclick="stopTimer('timer2')">Stop</button>
<button type="button" onclick="resetTimer('timer2')">Reset Timer</button>
</p>
<p></p>
<h4>Reactions of Sulphur Dioxide:</h4>
1. Sulphur dioxide gas reacts with water to form Sulphurous acid:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center;"
size=1 name=q3a>SO<sub>2</sub> + <input style="font-size: 16px; text-align: center" size=1 name=q3b> H<sub>2</sub>O → <input style="font-size: 16px; text-align: center;" size=1 name=q3c> H<sub>2</sub>SO<sub>3</sub> </p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(3,'Reactions of Sulphur dioxide',1,1,1,0,0,0,'SO<sub>2</sub>+ H<sub>2</sub>O','H<sub>2</sub>SO<sub>3</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(3,'Reactions of Sulphur dioxide',1,1,1,0,0,0,'SO<sub>2</sub>+ H<sub>2</sub>O','H<sub>2</sub>SO<sub>3</sub>');" type="button" value="Show answer"> </p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer3">00:00</span>
<button type="button" onclick="startTimer('timer3')">Start</button>
<button type="button" onclick="stopTimer('timer3')">Stop</button>
<button type="button" onclick="resetTimer('timer3')">Reset Timer</button>
</p>
<p></p>
2.Sulphur dioxide gas reacts with Sodium hydroxide solution to form Sodium sulphite and water:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center;"
size=1 name=q4a> SO<sub>2</sub> + <input style="font-size: 16px; text-align: center" size=1 name=q4b> NaOH → <input style="font-size: 16px; text-align: center;" size=1 name=q4c> Na<sub>2</sub>SO<sub>3</sub> + <input style="font-size: 16px; text-align: center;" size=1 name=q4d> H<sub>2</sub>O </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(4,'Reactions of Sulphur dioxide',1,2,1,1,0,0,'SO<sub>2</sub> + NaOH','Na<sub>2</sub>SO<sub>3</sub> + H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(4,'Reactions of Sulphur dioxide',1,2,1,1,0,0,'SO<sub>2</sub> + 2NaOH','Na<sub>2</sub>SO<sub>3</sub> + H<sub>2</sub>O');" type="button" value="Show answer"> </p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer4">00:00</span>
<button type="button" onclick="startTimer('timer4')">Start</button>
<button type="button" onclick="stopTimer('timer4')">Stop</button>
<button type="button" onclick="resetTimer('timer4')">Reset Timer</button>
</p>
<p></p>
3.Sulphur dioxide reacts with Chlorine gas in the presence of water to form Sulphuric acid and Hydrochloric acid:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center;"
size=1 name=q5a> SO<sub>2</sub>+ <input style="font-size: 16px; text-align: center;" size=1 name=q5b> Cl<sub>2</sub>+ <input style="font-size: 16px; text-align: center;" size=1 name=q5c>H<sub>2</sub>O → <input style="font-size: 16px; text-align: center;" size=1 name=q5d> H<sub>2</sub>SO<sub>4</sub> + <input style="font-size: 16px; text-align: center;" size=1 name=q5e> HCl </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(5,'Reactions of Sulphur dioxide',1,1,2,1,2,0,'SO<sub>2</sub> + Cl<sub>2</sub> + H<sub>2</sub>O','H<sub>2</sub>SO<sub>4</sub> + HCl');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(5,'Reactions of Sulphur dioxide',1,1,2,2,1,0,'SO<sub>2</sub> + Cl<sub>2</sub> +2H<sub>2</sub>O','H<sub>2</sub>SO<sub>4</sub> + 2HCl');" type="button" value="Show answer"> </p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer5">00:00</span>
<button type="button" onclick="startTimer('timer5')">Start</button>
<button type="button" onclick="stopTimer('timer5')">Stop</button>
<button type="button" onclick="resetTimer('timer5')">Reset Timer</button>
</p>
<p></p>
4.Sulphur dioxide reduces yellow Iron(III)Cloride into green Iron(II)chloride:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center;"
size=1 name=q6a>SO<sub>2</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q6b> FeCl<sub>3</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q6c>H<sub>2</sub>O →<input style="font-size: 16px; text-align: center;" size=1 name=q6d>FeCl<sub>2</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q6e>HCl+<input style="font-size: 16px; text-align: center;" size=1 name=q6f>H<sub>2</sub>SO<sub>4</sub></p>
<p style="font-size:115%; text-align:center;"><input onclick="check(6,'Reactions of Sulphur dioxide',1,2,2,2,2,1,'SO<sub>2</sub> + FeCl<sub>3</sub> + H<sub>2</sub>O','FeCl<sub>2</sub> + HCl+ H<sub>2</sub>SO<sub>4</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(6,'Reactions of Sulphur dioxide',1,2,2,2,2,1,'SO<sub>2</sub> + 2FeCl<sub>3</sub> + 2H<sub>2</sub>O','2FeCl<sub>2</sub> + 2HCl+ H<sub>2</sub>SO<sub>4</sub>');" type="button" value="Show answer"> </p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer6">00:00</span>
<button type="button" onclick="startTimer('timer6')">Start</button>
<button type="button" onclick="stopTimer('timer6')">Stop</button>
<button type="button" onclick="resetTimer('timer6')">Reset Timer</button>
</p>
<p></p>
5.Sulphur dioxide reduces orange acidified Potassium dichromate into green Chromium sulphate:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center;"
size=1 name=q7a>SO<sub>2</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q7b>K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q7c>H<sub>2</sub>SO<sub>4</sub>→<input style="font-size: 16px; text-align: center;" size=1 name=q7d>Cr<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q7e>K<sub>2</sub>SO<sub>4</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q7f>H<sub>2</sub>O</p>
<p style="font-size:115%; text-align:center;"><input onclick="check(7,'Reactions of Sulphur dioxide',3,1,1,1,1,1,'SO<sub>2</sub>+K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>+ H<sub>2</sub>SO<sub>4</sub>','Cr<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>+K<sub>2</sub>SO<sub>4</sub>+ H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(7,'Reactions of Sulphur dioxide',3,1,1,1,1,1,'3SO<sub>2</sub> + K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>+H<sub>2</sub>SO<sub>4</sub>','Cr<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>+K<sub>2</sub>SO<sub>4</sub>+ H<sub>2</sub>O');" type="button" value="Show answer"></p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer7">00:00</span>
<button type="button" onclick="startTimer('timer7')">Start</button>
<button type="button" onclick="stopTimer('timer7')">Stop</button>
<button type="button" onclick="resetTimer('timer7')">Reset Timer</button>
</p>
<p></p>
6.Sulphur dioxide reduces purple Potassium permanganate into colourless Manganese sulphate:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center;"
size=1 name=q8a>SO<sub>2</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q8b>KMnO<sub>4</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q8c>H<sub>2</sub>O →<input style="font-size: 16px; text-align: center;" size=1 name=q8d>MnSO<sub>4</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q8e>K<sub>2</sub>SO<sub>4</sub>+<input style="font-size: 16px; text-align: center;" size=1 name=q8f>H<sub>2</sub>SO<sub>4</sub></p>
<p style="font-size:115%; text-align:center;"><input onclick="check(8,'Reactions of Sulphur dioxide',5,2,2,2,1,2,'SO<sub>2</sub> + KMnO<sub>4</sub> + H<sub>2</sub>O','MnSO<sub>4</sub> + K<sub>2</sub>SO<sub>4</sub>+ H<sub>2</sub>SO<sub>4</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(8,'Reactions of Sulphur dioxide',5,2,2,2,1,2,'5SO<sub>2</sub> + 2KMnO<sub>4</sub> + 2H<sub>2</sub>O','2MnSO<sub>4</sub> + K<sub>2</sub>SO<sub>4</sub>+ 2H<sub>2</sub>SO<sub>4</sub>');" type="button" value="Show answer"></p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer8">00:00</span>
<button type="button" onclick="startTimer('timer8')">Start</button>
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