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hydrogen-peroxide.html
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<!DOCTYPE html>
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<title>Hydrogen Peroxide</title>
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<h1 style="text-align:center;"> Hydrogen Peroxide</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 Hydrogen Peroxide:</h4>
1. Hydrogen peroxide is prepared by the reaction of Barium peroxide with Phosphoric acid:
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q1a>BaO<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q1b>H<sub>3</sub>PO<sub>4</sub> → <input style= "font-size: 16px;text-align: center" size=1 name=q1c>Ba<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q1d> H<sub>2</sub>O<sub>2</sub> </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(1,'Preparation of Hydrogen Peroxide',3,2,1,3,0,0,0,'BaO<sub>2</sub> +H<sub>3</sub>PO<sub>4</sub>','Ba<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> + H<sub>2</sub>O<sub>2</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(1,'Preparation of Hydrogen Peroxide',3,2,1,3,0,0,0,'3 BaO<sub>2</sub> +2 H<sub>3</sub>PO<sub>4</sub>','Ba<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> + 3 H<sub>2</sub>O<sub>2</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="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. Hydrogen peroxide is also prepared by the reaction of Sodium peroxide with ice cold Sulphuric acid:
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q2a> Na<sub>2</sub>O<sub>2</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> H<sub>2</sub>O<sub>2</sub> </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(2,'Preparation of Hydrogen Peroxide',1,1,1,1,0,0,0,'Na<sub>2</sub>O<sub>2</sub> + H<sub>2</sub>SO<sub>4</sub>','Na<sub>2</sub>SO<sub>4</sub> + H<sub>2</sub>O<sub>2</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(2,'Preparation of Hydrogen Peroxide',1,1,1,1,0,0,0,'Na<sub>2</sub>O<sub>2</sub> +H<sub>2</sub>SO<sub>4</sub>','Na<sub>2</sub>SO<sub>4</sub> + H<sub>2</sub>O<sub>2</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="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 Hydrogen Peroxide:</h4>
<ul><li><p style="font-size:115%; color:blue;">Oxidizing Properties:</p>Hydrogen peroxide oxidizes:</li></ul>
<p></p>
1. Potassium iodide into iodine.
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q3a> H<sub>2</sub>O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q3b>KI → <input style= "font-size: 16px;text-align: center" size=1 name=q3c> I<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q3d>KOH </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(3,'Oxidizing Properties',1,2,1,2,0,0,0,'H<sub>2</sub>O<sub>2</sub> + KI','I<sub>2</sub> + KOH');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(3,'Oxidizing Properties',1,2,1,2,0,0,0,'H<sub>2</sub>O<sub>2</sub> +2 KI','I<sub>2</sub> + 2 KOH');" 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>
2. Black lead(II) sulphide into white Lead(II) sulphate.
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q4a> H<sub>2</sub>O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q4b>PbS → <input style= "font-size: 16px;text-align: center" size=1 name=q4c> PbSO<sub>4</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,'Oxidizing Properties',4,1,1,4,0,0,0,'H<sub>2</sub>O<sub>2</sub> + PbS','PbSO<sub>4</sub> + H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(4,'Oxidizing Properties',4,1,1,4,0,0,0,'4 H<sub>2</sub>O<sub>2</sub> + PbS','PbSO<sub>4</sub> + 4 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>
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<button type="button" onclick="resetTimer('timer4')">Reset Timer</button>
</p>
<p></p>
3. Acidified Iron(II)sulphate into Iron(III) sulphate.
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q5a> H<sub>2</sub>O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q5b>FeSO<sub>4</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q5c> H<sub>2</sub>SO<sub>4</sub> → <input style= "font-size: 16px;text-align: center" size=1 name=q5d> Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> +<input style= "font-size: 16px;text-align: center" size=1 name=q5e> H<sub>2</sub>O </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(5,'Oxidizing Properties',1,2,1,1,2,0,0,'H<sub>2</sub>O<sub>2</sub> + FeSO<sub>4</sub> + H<sub>2</sub>SO<sub>4</sub>','Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> + H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(5,'Oxidizing Properties',1,2,1,1,2,0,0,'H<sub>2</sub>O<sub>2</sub> + 2 FeSO<sub>4</sub> + H<sub>2</sub>SO<sub>4</sub>','Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> + 2 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="timer5">00:00</span>
<button type="button" onclick="startTimer('timer5')">Start</button>
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<button type="button" onclick="resetTimer('timer5')">Reset Timer</button>
</p>
<p></p>
4. Sodium sulphite into Sodium sulphate.
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q6a> H<sub>2</sub>O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q6b>Na<sub>2</sub>SO<sub>3</sub> → <input style= "font-size: 16px;text-align: center" size=1 name=q6c> Na<sub>2</sub>SO<sub>4</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q6d> H<sub>2</sub>O </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(6,'Oxidizing Properties',1,1,1,1,0,0,0,'H<sub>2</sub>O<sub>2</sub> + Na<sub>2</sub>SO<sub>3</sub> ','Na<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(6,'Oxidizing Properties',1,1,1,1,0,0,0,'H<sub>2</sub>O<sub>2</sub> + Na<sub>2</sub>SO<sub>3</sub> ','Na<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="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. Potassium nitrite into Potassium nitrate.
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q7a> H<sub>2</sub>O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q7b>KNO<sub>2</sub> → <input style= "font-size: 16px;text-align: center" size=1 name=q7c> KNO<sub>3</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q7d> H<sub>2</sub>O </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(7,'Oxidizing Properties',1,1,1,1,0,0,0,'H<sub>2</sub>O<sub>2</sub> + KNO<sub>2</sub>','KNO<sub>3</sub> + H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(7,'Oxidizing Properties',1,1,1,1,0,0,0,'H<sub>2</sub>O<sub>2</sub> + KNO<sub>2</sub>','KNO<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="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>
<ul><li><p style="font-size:115%; color:blue;">Reducing Properties:</p>Hydrogen peroxide reduces:</li></ul><p></P>
1. Chlorine into Hydrochloric acid.
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q8a> H<sub>2</sub>O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q8b>Cl<sub>2</sub> → <input style= "font-size: 16px;text-align: center" size=1 name=q8c> O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q8d>HCl </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(8,'Reducing Properties',1,1,1,2,0,0,0,'H<sub>2</sub>O<sub>2</sub> + Cl<sub>2</sub>','O<sub>2</sub> + HCl');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(8,'Reducing Properties',1,1,1,2,0,0,0,'H<sub>2</sub>O<sub>2</sub> + Cl<sub>2</sub>','O<sub>2</sub> + 2 HCl');" 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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<button type="button" onclick="resetTimer('timer8')">Reset Timer</button>
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<p></p>
2. Ozone into Oxygen.
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q9a> H<sub>2</sub>O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q9b> O<sub>3</sub> → <input style= "font-size: 16px;text-align: center" size=1 name=q9c> H<sub>2</sub>O + <input style= "font-size: 16px;text-align: center" size=1 name=q9d> O<sub>2</sub> </p>
<p style="font-size:115%; text-align:center;"><input onclick="check(9,'Reducing Properties',1,1,1,2,0,0,0,'H<sub>2</sub>O<sub>2</sub> + O<sub>3</sub>','H<sub>2</sub>O + O<sub>2</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(9,'Reducing Properties',1,1,1,2,0,0,0,'H<sub>2</sub>O<sub>2</sub> + O<sub>3</sub>','H<sub>2</sub>O + 2 O<sub>2</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="timer9">00:00</span>
<button type="button" onclick="startTimer('timer9')">Start</button>
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<button type="button" onclick="resetTimer('timer9')">Reset Timer</button>
</p>
<p></p>
3. Acidified Potassium permanganate into Manganous salt.
<p style="font-size:115%; text-align:center;"><input style= "font-size: 16px;text-align: center"
size=1 name=q10a> H<sub>2</sub>O<sub>2</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q10b>KMnO<sub>4</sub> <input style= "font-size: 16px;text-align: center" size=1 name=q10c>H<sub>2</sub>SO<sub>4</sub> → <input style= "font-size: 16px;text-align: center" size=1 name=q10d>K<sub>2</sub>SO<sub>4</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q10e>MnSO<sub>4</sub> + <input style= "font-size: 16px;text-align: center" size=1 name=q10f>H<sub>2</sub>O + <input style= "font-size: 16px;text-align: center" size=1 name=q10g>O<sub>2</sub></p>
<p style="font-size:115%; text-align:center;"><input onclick="check(10,'Reducing Properties',5,2,3,1,2,8,5,'H<sub>2</sub>O<sub>2</sub> + KMnO<sub>4</sub> + H<sub>2</sub>SO<sub>4</sub>','K<sub>2</sub>SO<sub>4</sub>O<sub>2</sub> + MnSO<sub>4</sub> + H<sub>2</sub>O + O<sub>2</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(10,'Reducing Properties',5,2,3,1,2,8,5,'5 H<sub>2</sub>O<sub>2</sub> + 2 KMnO<sub>4</sub> + 3 H<sub>2</sub>SO<sub>4</sub>','K<sub>2</sub>SO<sub>4</sub> + 2 MnSO<sub>4</sub> + 8 H<sub>2</sub>O + 5 O<sub>2</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="timer10">00:00</span>
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