How to make a 55ml of a 3% solution of NaCl?

Lane, Kristy, Da or whomever, please don't change screen names. It gets us mixed up.

Technically, I can't answer this question.
If you want 3% w/w solution, you place 3g NaCl with 97 g H2O (is that the solvent?) but I don't know what volume that will be. Certainly it will be more than 55 mL. If you look up the density of 3% NaCl, then we could do it exactly.

If you want 3% w/v solution, dissolve 3 g NaCl in water to make a final solution of 100 mL. Of course that will be more than you want but we don't know how much water that takes since the NaCl will take us some volume.

sorry, just asking a question.

To make a 55ml of a 3% solution of NaCl (sodium chloride), you'll need to follow these steps:

1. Determine the amount of NaCl needed: The concentration of a solution is typically expressed as a percentage by weight or volume. In this case, a 3% solution means there is 3g of NaCl dissolved in 100ml of the solution.

So, to calculate the required amount of NaCl for a 55ml solution, you can use the following formula:
(55ml / 100ml) x (3g) = 1.65g

2. Measure the required amount of NaCl: Using a laboratory balance or a measuring spoon, measure out 1.65g of NaCl.

3. Dissolve NaCl in water: Pour the measured NaCl into a clean container and add enough water to reach 55ml. You can use distilled water or any clean water source.

4. Mix or stir the solution: Stir the solution gently until all the NaCl is completely dissolved.

5. Verify the concentration (optional): If you want to ensure the exact concentration, you can measure the final volume of the solution and calculate the percentage. However, with a precise measurement of 1.65g of NaCl in 55ml of water, the concentration should be close to 3%.

Remember, it's essential to handle chemicals safely, wear appropriate protective equipment, and adhere to good laboratory practices while working with solutions.