A combustion analysis of 1.200 g of an anhydrous sodium salt gave 0.942 g of CO2, 0.0964 g of H2O, and 0.246 g of Na. The molar mass of the salt is 112.02 g.mol-1.
(a) What is the chemical formula of the salt?
(b) The salt contains carboxylate groups (CO2-), and the carbon atoms are bonded together. Draw the Lewis structure of the anion.
(c) Next, 1.50 g of this sodium salt was dissolved in water and diluted to 50.0 mL. Identify the dissolved substance: Is it an acid, a base, or is it amphiprotic? Calculate the pH of the solution.