Chemistry, 14.12.2020 16:50 bethania26
An unknown weak base with a concentration of 0.0910 M has a pH of 10.50. What is the Kb of this base
Answers: 3
for the weak base is 
![K_b=\frac{[HA][OH^-]}{[A^-]}](/tpl/images/0980/4654/205fb.png)
![pOH=-log[OH^-]](/tpl/images/0980/4654/4fd6b.png)
![[OH^-]=antilog(-3.5)= 3.2\times 10^{-4}M](/tpl/images/0980/4654/30b96.png)
![[OH^-]=c\alpha=3.2\times 10^{-4}](/tpl/images/0980/4654/5216a.png)
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An unknown weak base with a concentration of 0.0910 M has a pH of 10.50. What is the Kb of this base...
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