Question

A soda ash is analyzed in the analytical chemistry laboratory by titration with standard hydrochloric acid. The analysis is performed in triplicate with the following results: 93.50, 93.58, 93.43% Na2CO3. Within what range are you 95% confident that the true value lies?

Answer 1

93.50±5%

Step-by-step explanation:

Hello,

The average of the results turns out in 93.50% Na2CO3, thus, the range that the true value lies on is:

93.50±5%

For us to have be 95% confident that we've got the correct result.

Best regards.