How many grams of NaF are needed to make 50 mL of a 2% aqueous solution?
Is this 2% w/v. I'll assume so.
[(g solute/mL solution)]*100 = %
Substitute and solve for g solute.
Yes
To find out how many grams of NaF are needed to make a 2% aqueous solution, you need to know the mass/volume percent equation, which is:
(Mass of solute / Volume of solution) * 100 = Mass/Volume Percent
In this case, the desired mass/volume percent is 2% and the volume of the solution is 50 mL. The mass of the solute (NaF) can be calculated by rearranging the equation:
Mass of solute = (Mass/Volume Percent) * Volume of solution / 100
Let's plug in the values:
Mass of solute = (2% * 50 mL) / 100
Mass of solute = (0.02 * 50 mL) / 100
Mass of solute = 1 g
Therefore, you will need 1 gram of NaF to make a 2% aqueous solution with a volume of 50 mL.