You are given a 25.0mL volumetric flask, describe the procedure you will follow in lab to prepare 25.0mL of a 0.019 M solution of NaCl?
Firstly you have to weigh the NaCl.
Secondly put the weighed NaCl into the volumetric flask.
Lastly after you've put NaCl into the container, add H2O up to 25ml mark.
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To prepare a 25.0 mL of a 0.019 M solution of NaCl using a 25.0 mL volumetric flask, follow these steps:
1. Gather the necessary materials: You will need a 25.0 mL volumetric flask, a balance, distilled water, and NaCl powder.
2. Calculate the mass of NaCl required: To determine the mass of NaCl needed, use the formula:
mass(g) = volume(L) x molarity(M) x molar mass(g/mol)
In this case, the volume is 0.025 L (25.0 mL converted to liters), the molarity is 0.019 M, and the molar mass of NaCl is 58.5 g/mol. So the calculation would be:
mass(g) = 0.025 L x 0.019 M x 58.5 g/mol
Solve the equation to find the mass required.
3. Weigh the NaCl: Using a balance, measure out the calculated mass of NaCl accurately.
4. Dissolve NaCl: Add the weighed NaCl sample to the 25.0 mL volumetric flask.
5. Add distilled water: Carefully add distilled water to the flask until the mark on the neck of the volumetric flask is reached. The mark indicates 25.0 mL.
6. Mix thoroughly: Cap the flask and then gently invert it several times to ensure complete mixing.
7. Label the flask: Clearly label the flask with the solution concentration, which is 0.019 M NaCl.
Now, you have successfully prepared a 25.0 mL 0.019 M NaCl solution in a volumetric flask.