Explain how many grams of sodium dichromate, Na2Cr2o7, must be added to a 100mL volumetric flask to prepare .025M Na2Cr2o7 when the flask is filled to the marker with water?
Compute the concentration of each ion in solution.
If you added to the given solution 20mL of .5M NaCl solution, explain what would be the final concentration of sodium ions in solution?