To prepare 5.00 kg of an aqueous solution that is 8.00% in NaCl by mass, the following process can be used:
1. Calculate the amount of NaCl needed:
- 8.00% of 5.00 kg = 0.08 x 5.00 kg = 0.40 kg
- Therefore, 0.40 kg of NaCl is needed to prepare the desired solution.
2. Dissolve the NaCl in water:
- Add some water to a suitable container.
- Slowly add the NaCl to the water while stirring continuously to ensure it dissolves completely.
- Continue adding water until the final volume of the solution is 5.00 kg.
3. Verify the concentration of the solution:
- Measure the mass of the solution using a scale.
- Calculate the percentage of NaCl in the solution by mass:
- Mass of NaCl in the solution / Mass of the solution x 100%
- (0.40 kg / 5.00 kg) x 100% = 8.00%
- The final concentration of the solution should be 8.00% by mass.
4. Store the solution:
- Pour the solution into a clean, labelled container.
- Store the solution in a cool, dry place away from sunlight and heat sources.
- Avoid storing the solution in a metal container as NaCl can corrode metals.
Describe the process you would use in order to prepare 5.00 kg of an aqueous solution that is 8.00% in NaCl By mass.
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