Define the following terms.  1) Standard solution 2) Primary standard 3) End point 4) Molarity of a solution 5) Normality of solution 6) A 0.405 g sample of oxalic acid, H2C2O4 requires 38.5 mL of NaOH. Find the molarity of NaoH.  7) Rolaid tablet contains a calcium carbonate that neutralizes the stomach acid and starch as packing material. A 3.5 g sample of the tablet takes 34.5 mL of 0.10M Hel solution to completely neutralize it. Calculuate the percent of calcium carbonate in the sample.

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