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 - DrBob 222, Tuesday, July 15, 2008 at 8:07pm
Accuracy is how close the analyst is to the actual value. The precision is how close the repetitive values are to each other.
Chemistry - shanta, Tuesday, July 15, 2008 at 8:21pm
consider a .90 M Al(NO3)3 solution. what is the molar concentration of nitrate ion in this solution?
Chemistry - DrBob 222, Tuesday, July 15, 2008 at 8:28pm
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 ??