You are preparing a solution and you record the following data.                Mass of NaCl = 9.93 g ± 0.01 g                Volume of volumetric flask = 200.00 cm3 ± 0.15 cm3M  NaCl = 58.44 g mol–1What is the correct concentration of the solution together with the absolute uncertainty?

If 211 mL of water is added to 5.00 mL of 3.24 M NaCl solution, what is the concentration of the new solution? ___ M Your answer should be rounded to two significant figures. Do not include units in your answer.

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)

5.0 cm3 of 2.00 moldm–3 sodium carbonate solution, Na2CO3(aq), was added to a volumetric flask and the volume was made up to 500 cm3 with water. What is the concentration, in moldm–3, of the solution?A.     0.0050B.     0.0040C.     0.020D.     0.010

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.

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.