Answers: 3
![pH=pKa+log(\frac{[A^-]}{[HA]} )](/tpl/images/0553/3571/4a01a.png)
![log(\frac{[A^-]}{[HA]} )=3.50-[-log(3.37x 10^{-7})]=3.50-6.47=-2.97}\\\\\frac{[A^-]}{[HA]} =10^{-2.97}=1.07x10^{-3}](/tpl/images/0553/3571/b4cdb.png)
![[A^-]=1.07x10^{-3}}[HA]](/tpl/images/0553/3571/1acb8.png)
![[H]^+=[A^-]=10^{-pH}=10^{-3.50}=3.16x10^{-4}M](/tpl/images/0553/3571/d3a0e.png)
![[HA]=\frac{3.16x10^{-4}M}{1.07x10^{-3}} =0.296M](/tpl/images/0553/3571/7981c.png)
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Thiamine hydrochloride (C12H18ON4SCl2) is a water-soluble form of thiamine (vitamin B1; Ka = 3.37×10...
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