Answer:
To make a 1-liter solution of 0.45 M K2SO4 using K2SO4 powder and water:
Step-by-step explanation:
Add the atomic masses of potassium (K), sulfur (S), and oxygen (O) to determine the molar mass of K2SO4. There are 174.3 g/mol of molar mass.
Calculate the required quantity of K2SO4 powder. You must use the calculation mass = moles * molar mass to determine the necessary mass to reach a concentration of 0.45 M. Calculate the mass of K2SO4 using the molarity that has been provided.
Utilizing a balance, precisely measure the calculated mass of K2SO4 powder to be added to the solution. When the powder is entirely dissolved, transfer the powder to a container and gradually add water while stirring gently.
If more water is required, adjust the solution's final volume to 1 liter. By doing this, the concentration is guaranteed to stay at 0.45 M.