11. From 250 ml of a solution containing sulfuric acid, 20 ml were taken and titrated with coulometric electrogenerated hydroxide ions at a current of 8 mA. Time to reach the equivalence point 268 sec. A blank sample is titrated for 35 seconds. Determine the mass of acid in the initial solution.

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