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13 July, 21:50

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?

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  1. 13 July, 21:57
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    93.50±5%

    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.
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