Sodium chloride solution prep
NaCl Molarity Calculator
Calculate NaCl mass for molar solutions, including a worked 1 M NaCl recipe, formula, scaling notes, and common mistakes.
How to make 1 L of 1 M NaCl
- NaCl
- 58.44 g/Lmolar mass 58.44 g/mol
Preparation steps
- 1Weigh 58.44 g NaCl.
- 2Dissolve in about 800 mL water.
- 3Bring to 1 L final volume and mix thoroughly.
- 4Sterilize if your downstream workflow requires it.
Worked example
- For 100 mL of 1 M NaCl: 1 mol/L × 0.100 L × 58.44 g/mol = 5.844 g NaCl.
Safety and verification
- Use the appropriate grade of NaCl for the application.
- Label concentration and preparation date; sterile applications need validated sterilization.
Common mistakes
- Using 58.44 g for 100 mL instead of 1 L.
- Adding a full final volume of water after adding salt rather than bringing to final volume.
Frequently asked questions
How many grams of NaCl are in 1 M?
1 M NaCl requires 58.44 g per liter because NaCl has a molar mass of about 58.44 g/mol.
How do I make 100 mL of 1 M NaCl?
Weigh 5.844 g NaCl, dissolve in less than 100 mL water, then bring to 100 mL final volume.
Can I use this for other NaCl concentrations?
Yes. Multiply target molarity by final liters by 58.44 g/mol, or use the LabTools molarity calculator.
Scale this recipe without spreadsheet drift
Open LabTools for unit-aware solution prep, buffer presets, and protocol-style output.