Redox Reactions: Sparkling ChemistryINTRODUCTION Explosives and rocket fuels are poW ired by...

Question

Redox Reactions: Sparkling ChemistryINTRODUCTION Explosives and rocket fuels are poW ired by oxidation-reduction (redo') reactions The same is eve for sParklers which are prepared primanty from nitrates. chlorates and metals such as magnesium: Iron and aluminum, with a binder to hold them together. The nitrates and chlorates decompose in the le mat of tho flame with enough energy to throw sparks into the air Metal nitrates decompose to form nitntes at elevated temperatures or (when the nitntes are also unstable) oxides, plus nitrogen and oxygen gas. Such is the case with barium nitrate:2 Ba(NO3)2(s) 2 BaO(s) • N2(g XXXXXXXXXXg) Potassium chlorate decomposes to yield potassium chloride and oxygen gas' 2 KCI03(s) 2 KCI XXXXXXXXXXg) The formation of the gases provides the necessary force to eject bits of powdered metal that bum in air to produce oxides:2 Mg(s) + 02(g) --------> 2 MgO(s)4 Al(s) + 3 OZ(g) 2 Al203(s)4 Fe(s XXXXXXXXXXg) > 2 Fe203(s) Starch will be used as a binder in this experiment, and iron wire will serve as both a support and a conductor of heat to keep the sparklers burning.PROCEDURE• Weigh the following inorganic ingredients on separate weighing papers: 5.0 g iron powder (-200 mesh) 0.25 g magnesium powder (-325 mesh) 1.0 g aluminum powder XXXXXXXXXXmesh) 3.0 g potassium chlorate 12.5 g barium nitrate• Combine all of the above in a large beaker, mix well to obtain a uniform mixture. • Weigh out 3.0 g of soluble starch in a 250 mL beaker and add 8.0 mL of distilled water.

Robert · Accepted Answer

Solution TTs021013_112036_8 
Background: 
A Sparkler is a sparkling example of Oxidation-Reduction reaction. So, let us see 
what makes a sparkler. 
Oxidizers: Ba(NO3)2 KCLO3 
Oxidizers reduce fuels -which is an exothermic reaction. At high temperature both 
the oxidizers produce oxygen gas and barium nitrate produces nitrogen gas in 
addition to oxygen gas. High volume of these gases forces the burning metal 
particles to eject with high speed which gives rise to “sparkling” effect. 
2 Ba(NO3)2 (s) ------- 2 BaO (s) + 2 N2(g)  + 5 O2(g) 
2 KClO3(s)  -------- 2 KCl (s)  +  3 O2(g)
Fuel: Metal powder e.g. Mg, Al and Fe.  
These serve as both - fuel and reducing agent. When these metals glow like 
incandescent light on burning.

Redox Reactions: Sparkling Chemistry INTRODUCTION Explosives and rocket fuels are poW ired by oxidation-reduction (redo') reactions The same is eve for sParklers which are prepared primanty from...

Solution

Answer To This Question Is Available To Download

Related Questions & Answers

Submit New Assignment