1. The problem statement, "all variables and given/known data A solution of nitric acid, HNO3, of concentration 100 g dm-3, can be used to artificially age wood. A sample of nitric acid was tested by pipetting 10.00 cm3 of the acid into a 250 cm3 volumetric flask and filled up with deionised water to the mark. A titration took place where 19.95 cm3 (mean titre) of sodium hydroxide solution with a concentration of 0.0800 mol dm-3 was added to 25 cm3 Calculate the concentration of the undiluted nitric acid in g dm-3 2. Relevant equations MaVa = MbVb 3. The attempt at a solution Using the above equation I got the concentration of the 25 cm3 of nitric acid solution as 0.6384mol dm-3, which is 40.2192g dm-3, but how do I find the undiluted concentration?