6. For titration of a solution of 0.7092 g of sodium alkaline substance in the presence of phenolphthalein, 12.95 ml is spent, and in the presence of methyl orange 26.02 ml of 0.5100 mol / l HCl. What is the main product in the test substance? How many percent?

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.