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 a 3.2 g of a 5.00% aqueous solution of NaCl, you need to determine the mass of NaCl and the mass of water required. The 5.00% concentration indicates that 5.00% of the total mass of the solution is NaCl.
Here's how you can calculate it:
1. Start by finding the mass of NaCl required. Multiply the total mass of the solution (3.2 g) by the percentage of NaCl (5.00% or 0.05):
Mass of NaCl = Total mass of solution x Percentage of NaCl
Mass of NaCl = 3.2 g x 0.05
Mass of NaCl = 0.16 g
Therefore, you will need 0.16 g of NaCl for the solution.
2. To find the mass of water needed, subtract the mass of NaCl from the total mass of the solution:
Mass of water = Total mass of solution - Mass of NaCl
Mass of water = 3.2 g - 0.16 g
Mass of water = 3.04 g
Therefore, you will need 3.04 g of water for the solution.
In summary, to make up 3.2 g of a 5.00% aqueous solution of NaCl, you will need 0.16 g of NaCl and 3.04 g of water.