1. Cleanliness
2. Precise weighing
3. Controlled environment
Step-by-step explanation:
The gravimetric experiment is a technique used in analytical chemistry to determine the amount of a substance in a sample by measuring its mass. To ensure accurate and reliable results, several precautions are followed during the experiment, including:
1. Cleanliness: The equipment used in the experiment must be clean and free from any contaminants that may affect the measurements. This includes weighing boats, glassware, and other equipment.
2. Precise weighing: Accurate measurements are essential in gravimetric analysis. Therefore, it is essential to use precise weighing balances that are calibrated regularly and check for any external factors that may affect the measurements like vibrations.
3. Controlled environment: It is crucial to maintain a controlled environment during the experiment to minimize the effects of temperature, humidity, and other factors that may affect the measurements. This may include using a fume hood to prevent contamination by airborne particles or performing the experiment in a temperature-controlled room.