Asked by Mandy

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.
Answered by DrBob 222
Accuracy is how close the analyst is to the actual value. The precision is how close the repetitive values are to each other.
Answered by shanta
consider a .90 M Al(NO3)3 solution. what is the molar concentration of nitrate ion in this solution?
Answered by DrBob 222
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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