Chemistry, 05.12.2019 23:31 maljoh8249
Enter your answer in the provided box. an industrial chemist studying bleaching and sterilizing prepares a hypochlorite buffer using 0.450 m hclo and 0.450 m naclo. (ka for hclo = 2.9 × 10−8) find the ph of 1.00 l of the solution after 0.040 mol of naoh has been added.
Answers: 2
![\begin{array}{rcl}\text{pH} & = & \text{pK}_{\text{a}} + \log \left(\dfrac{[\text{A}^{-}]}{\text{[HA]}}\right )\\\\& = & 7.54 +\log \left(\dfrac{0.450}{0.450}\right )\\\\& = & 7.54 + \log1.00 \\ & = & 7.54 + 0.00\\& = & 7.54\\\end{array}](/tpl/images/0405/3467/7ad02.png)
![\begin{array}{rcl}\text{pH} & = & \text{pK}_{\text{a}} + \log \left(\dfrac{[\text{A}^{-}]}{\text{[HA]}}\right )\\\\& = & 7.54 +\log \left(\dfrac{490}{410}\right )\\\\& = & 7.54 + \log1.195 \\& = & 7.54 +0.0774\\& = & \mathbf{7.62}\\\end{array}\\\text{The new pH is $\large \boxed{\textbf{7.62}}$}](/tpl/images/0405/3467/ab2c6.png)
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