To effect of concentration of sodium thiosulphate solution
Answers
• Kinetics • Rate law
• Order of reaction • Concentration
Materials
Hydrochloric acid solution, HCl, 2 M, 25 mL Graduated cylinders, 10-mL, 5
Sodium thiosulfate solution, Na2S2O3, 0.15 M, 150 mL Overhead projector or light box
Distilled or deionized water Permanent marker
Beakers, 100-mL, 5 Stirring rods
Graduated cylinders, 50- or 100-mL, 2 Stopwatch or timer
Safety Precautions
Hydrochloric acid solution is corrosive to eyes and skin. It is moderately toxic by ingestion and inhalation. Sodium thiosulfate solution is
a body tissue irritant. The reaction of sodium thiosulfate and hydrochloric acid generates sulfur dioxide gas, which is a skin and eye
irritant. Perform this demonstration in a well-ventilated lab only. Avoid contact of all chemicals with eyes and skin. Wear chemical
splash goggles, temperature-resistant gloves, and chemical-resistant apron. Please review current Material Safety Data Sheets for
additional safety, handling, and disposal information.