Chemistry

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A student performed an anaysis of a samply for its calcium content and got the following results :

14.92% , 14.91%, 14.88% , 14.91%

the actualy amount of calcium in te sample is 15.70%. What conclusion can you draw about the accuracy and precision of these results?

--im really confused with this problem for some reason. please help me.

  • Chemistry -

    Accuracy is how close the analyst is to the actual value. The precision is how close the repetitive values are to each other.

  • Chemistry -

    consider a .90 M Al(NO3)3 solution. what is the molar concentration of nitrate ion in this solution?

  • Chemistry -

    Shanta, please go to the top of the page and click on post a new question. Post a question in your name instead of an answer to another problem. Since there are three nitrate ion per mole of Al(NO3)3, then the nitrtion concn is ??

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