Chemistry, 27.07.2019 06:30, malacath3394
The concentration of so42–(aq) in a sample of river water can be determined using a precipitation titration in which a salt of ba2+(aq) is the standard solution and baso4(s) is the precipitate formed. what is the concentration of so42– (aq) in a 56.1 ml sample if 5.00 ml of a 0.00100 m ba2+(aq) solution is needed to precipitate all the so42–(aq) in the sample?
Answers: 1
![molesSO_4^{-2}=[Ba^{+2} ]*VBa^{+2}(L)=0,001M*0,005 L \\ \\ molesSO_4^{-2}=0,000005 moles](/tpl/images/0137/8390/1bb08.png)
![[SO_4^{-2}]= \frac{molesSO_4^{-2}}{V sol (L)}= \frac{0,000005 molesSO_4^{-2}}{0,0561 L}=0,000089M](/tpl/images/0137/8390/8c020.png)
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