Hi, I need help with a making solutions lab because I was not there when we learned about this.

D: Making a Solution Lab

The purpose of this lab is to make a solution and use carefully measured data to calculate the solution’s concentration and demonstrate an understanding of dilution.

1. Mass a clean, dry 100-mL volumetric flask. Record on data table.

2. To your 10-mL graduated cylinder, add enough NaCl to reach _5.0 mL.

3. Add the salt to your volumetric flask and take the mass of the flask plus salt and record on data table.

4. Add water to the volumetric flask and shake gently until all of the NaCl dissolves.

5. Continue to add water until you reach the mark. Mass and record the flask plus NaCl plus water on data table.

6. Pour solution in beaker. Add 2 drops of food coloring to your solution.

7. Using your prepared solution from step 6, prepare a new 100 mL solution of colored saltwater that is 0.05 M.

Data Table:

Analysis (show calculations for credit):

1. Calculate the mass of the solute (NaCl) (show calculation)

1. Calculate the mass of the solvent (H2O) (show calculation)

1. Percent by mass tells how many grams of solute are present in 100 g of your solution.

mass of solute ___ X 100

% by mass = mass of solute + mass of solvent

Calculate the percent by mass of NaCl in the solution. (show calculation)

1. Molarity (M) tells how many moles of solute are dissolved per liter of solution.

1. Find the liters of solution. (look at container carefully)

1. Calculate the molarity of the solution. (show calculation)

1. Dilution is the act of reducing the concentration of a stock solution.

1. Show the calculation you made to determine how to prepare the 0.05 M solution of colored saltwater.

1. What observation did you make about the new solution?