Significant figures in Ch.12

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Rachel Tat 3E
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Joined: Fri Sep 25, 2015 3:00 am

Significant figures in Ch.12

Postby Rachel Tat 3E » Sun Nov 29, 2015 7:32 pm

In many of the homework problems in chapter 12, the numbers given in the homework will have 2 significant figures, but the answer key to the textbook usually has 4 or 3 significant figures when solving for pH or molar concentrations and not 2 significant figures, which has made rounding during my calculations a little confusing. What number of significant figures should we be using?

304621080
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Re: Significant figures in Ch.12

Postby 304621080 » Sun Nov 29, 2015 7:55 pm

My TA explained that you should prolong rounding your answer until the very end of your calculations to ensure the accuracy of your answer. But with regards to the significant figures, it should be two since the questions themselves have two significant figures. On the final, that is what should be correct.


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