Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).
To make up 3.2 g of a 5.00% aqueous solution of NaCl, you need to determine the masses of NaCl and water that need to be mixed.
Step 1: Determine the total mass of the solution
The total mass of the solution is given as 3.2 g.
Step 2: Calculate the mass of NaCl
The solution is 5.00% NaCl. This means that 5.00% of the total mass is NaCl. To calculate the mass of NaCl, you can use the formula:
Mass of NaCl = Percentage of NaCl * Total mass of the solution
Substituting the given values:
Mass of NaCl = 5.00% * 3.2 g
Step 3: Calculate the mass of water
To find the mass of water, subtract the mass of NaCl from the total mass of the solution:
Mass of water = Total mass of the solution - Mass of NaCl
Substituting the values:
Mass of water = 3.2 g - Mass of NaCl
Step 4: Calculate the actual masses
Now that you know the mass of NaCl and the mass of water, you can calculate the actual masses:
Mass of NaCl = 5.00% * 3.2 g
Mass of water = 3.2 g - Mass of NaCl
Calculating these values will give you the masses of NaCl and water that need to be mixed to make up a 3.2 g solution of 5.00% aqueous NaCl.