A student performed a serial dilution involving a 1.00 mol dm–3 solution of NaCl. To do this, the student took 10 cm3 of that solution, added it to a 100 cm3 volumetric flask and diluted with water up to 100 cm3 to create dilution #1. The student then took 10 cm3 of dilution #1, added it to a 100 cm3 volumetric flask and diluted with water up to 100 cm3 to create dilution #2. The student repeated this process 3 more times to get dilution #5.Calculate the concentration of dilution #5 in g cm–3.

If you were making a 1:10 dilution of a 100mM NaCl solution what will be its final concentration?

A second-year chemistry student is asked to make up a 250.0 mL sample of 5.87 M aqueous sodium chloride, NaCl solution.Molar mass of NaCl = 58.44 g mol-1 (a) Calculate the mass (in grams) of solid sodium chloride that the student would need to weigh out. Provide your numerical answers and units. (b) The student is then asked to make up 100.0 mL of sodium chloride solution using 15.00 mL of the 5.87 M NaCl solution made up in part (a). The diluted solution is then mixed completely. Determine the concentration of the diluted sodium chloride solution.

You have prepared a 2 M stock solution of an analyte you will be diluting to prepare your standard solutions.  What volume (in mL) will you need to add and dilute in a 250 mL volumetric flask to achieve a final concentration of 0.06 M?  Answer to 1 decimal place (Hint: C1V1=C2V2)

A dilute solution of sodium chloride was prepared with a concentration of 50.0 ppm. Convert this concentration to a molar concentration in mol dm−3.

A student found a 500 cm3 sample of vinegar. Knowing that vinegar is a solution of ethanoic acid (CH3COOH) and water, this student decided to take a 25.0 cm3 sample, dilute it with 25.0 cm3 of water and then react it with sodium hydroxide. The dilute sample required 37.0 cm3 of 0.850 mol dm–3 sodium hydroxide solution to react entirely with it via the following reaction:                CH3COOH(aq) + NaOH(aq) → NaCH3COO(aq) + H2O(l)Calculate the concentration of ethanoic acid in the original 500 cm3 sample of vinegar.