How will you prepard o.5m, 1.0m, 2m & 4.0m solution of NaCl for 100ml
To prepare different concentrations of NaCl solutions, such as 0.5M, 1.0M, 2.0M, and 4.0M, you will need to know the molar mass of NaCl, as well as the desired volume and molarity of the solution. Here's how you can prepare each solution:
1. Calculate the number of moles required for each solution using the following formula:
Moles = Molarity (M) x Volume (L)
For example, for a 0.5M solution, the moles required would be:
Moles = 0.5M x 0.1L = 0.05 moles
2. Determine the mass of NaCl required using the formula:
Mass (g) = Moles x Molar Mass (g/mol)
The molar mass of NaCl is 58.5 g/mol.
For example, for a 0.5M solution:
Mass (g) = 0.05 moles x 58.5 g/mol = 2.925 grams
3. Dissolve the calculated mass of NaCl in a small volume of water and then transfer the solution to a 100ml volumetric flask.
4. Add water to the flask slowly while swirling until the total volume reaches 100ml. Ensure that the NaCl is fully dissolved in the solution.
Repeat the same procedure for the remaining concentrations (1.0M, 2.0M, and 4.0M) by adjusting the moles and mass accordingly. Remember to dissolve the NaCl in a small volume of water before adding it to the volumetric flask and then dilute to the final desired volume of 100ml.
It is important to wear appropriate protective equipment such as gloves and goggles when handling chemicals.