During a recent lab a chemist titrates a 35.0 gram sample of sulfuric acid cleaner (used to clean metals) using a 0.25 M solution of potassium hydroxide. She uses a total of 142.5 mL of base to reach the endpoint for the bromthymol blue indicator.
a.
How many grams of sulfuric acid are in the sample?
b. The label on the cleaner says it is a 3.00% by mass solution. What is the % error for this experiment?
