Preparation of potassium nitrate

Introduction

potassium nitrate

Stability

Stable. Strong oxidizer - contact with combustible material may cause fire. Incompatible with combustible materials, and strong reducing agents.

Toxicology

Harmful if swallowed. May cause reproductive disorders

Aim

The aim of this experiment is to determine the crystallisation temperature of the solution potassium nitrate at different concentrations and use information to find out the standard enthalpy of potassium nitrate.


Equipment and reagents


• Boiling tubes
• Dark card
• Bunsen burner
• Thermometer
• Weighing scale
• Burette (50cm3)
• Clamp
• Stand
• Potassium nitrate
• Deionised water/ distilled water


Safety


• Wear goggles for eye protection at all times.
• Laboratory coats must be worn at all times.
• Wear gloves to avoid chemical contact to skin, potassium nitrate.
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