I have test procedure to evaluate the clarity of a sodium hydroxide (NaOH) sample that goes like this:
Dissolve 10g of NaOH in carbon dioxide free water and dilute to 100ml with the same solvent.
Please explain how to perform this test.
Do I boil 100ml of deionized water and pour the hot water into a beaker containing 10g of NaOH?
Thanks.
see above.
To perform the test procedure, you would need the following materials: a balance capable of measuring grams, a 100 mL volumetric flask, deionized water, a beaker, and a stirring rod. Here's a step-by-step guide on how to perform the test:
1. Start by measuring exactly 10 grams of solid sodium hydroxide (NaOH) using a balance. Ensure the balance is zeroed before measuring.
2. Next, obtain a carbon dioxide (CO2) free water source. Deionized water can be used as long as it is free from any dissolved CO2. Ensure that the water is at room temperature.
3. Take a clean and dry 100 mL volumetric flask and carefully transfer the 10 grams of NaOH powder into it. The volumetric flask is specially designed to accurately measure and hold the specified volume.
4. Slowly add the deionized water to the volumetric flask by pouring it along the side, not directly onto the solid NaOH. Add the water until the flask is filled to the mark etched on the neck of the flask. You can use a dropper, pipette, or a funnel to help with precise pouring.
5. Once the water is added, securely fit the stopper onto the volumetric flask and gently invert it multiple times to ensure thorough dissolution of the NaOH. Avoid vigorous shaking, as it could introduce air bubbles.
Congratulations! You have now completed the test procedure. The resulting solution is now ready for further evaluation. It is not necessary to boil the water before adding it to the NaOH since NaOH readily dissolves in water at room temperature.