Calculate the grams of substance required to prepare 250mL of 5%(wt/vol) NaNO3
12.5
Students
To calculate the grams of substance required to prepare a solution, you need to know the concentration and volume of the solution you want to prepare. In this case, you want to prepare a 5% (wt/vol) NaNO3 solution with a volume of 250mL.
Step 1: Convert the percent concentration to a decimal fraction.
5% can be written as 5/100, which simplifies to 0.05.
Step 2: Calculate the mass of the solute (NaNO3) using the formula:
Mass = Concentration x Volume
Mass = 0.05 x 250mL
= 12.5 grams
Therefore, you would require 12.5 grams of NaNO3 to prepare a 250mL solution with a 5% (wt/vol) concentration.