Procedure For NH4Cl And CaCl2 Experiments In Lab
Procedure for NH4Cl and CaCl2 experiments in lab
The experimental procedure involved preparing solutions of ammonium chloride (NH4Cl) and calcium chloride (CaCl2) by accurately measuring specific amounts of each compound using a balance. For the NH4Cl solution, 2.42 grams of the solid was weighed. Similarly, 5.54 grams of CaCl2 was measured for the calcium chloride solution. Subsequently, 50 milliliters of distilled water was added to a suitable container, and the temperature of the water was measured using a temperature probe to establish the initial temperature.
For the NH4Cl experiment, the measured 2.42 grams of NH4Cl was gradually added into the 50 mL of distilled water. Upon addition, a thermometer was inserted into the mixture, and the container was covered to prevent heat exchange with the environment. The temperature was recorded immediately after covering, then every 15 seconds for a total duration of three minutes. This process was repeated three times to ensure the reliability and consistency of the temperature measurements. The same procedure was followed for the CaCl2 experiment, where 5.54 grams of calcium chloride was added to a new 50 mL distilled water sample, and temperature measurements were taken in the same manner, every 15 seconds for three minutes, three times.
Summary of Steps:
- Weigh specific amounts of NH4Cl (2.42 g) and CaCl2 (5.54 g) using a balance.
- Prepare 50 mL of distilled water in a clean container.
- Measure and record the initial temperature of the water using a temperature probe.
- Add NH4Cl into the water; insert the thermometer and cover the container.
- Record the temperature immediately after covering, then every 15 seconds for a total of 3 minutes, repeating three times.
- Repeat the above steps with CaCl2 in a new container and water sample.