Answers: 1
:![\displaystyle K = \frac{\left(a_{\mathrm{H_2CO_3\, (aq)}}\right)}{\left(a_{\mathrm{H^{+}}}\right)^2\, \left(a_{\mathrm{{CO_3}^{2-}\, (aq)}}\right)} \approx \frac{[\mathrm{H_2CO_3}]}{\left[\mathrm{H^{+}\, (aq)}\right]^{2} \, \left[\mathrm{CO_3}^{2-}\right]}](/tpl/images/0726/6258/84dbc.png)
.
, 
, and 
denote the activities of the three species, and ![[\mathrm{H_2CO_3}]](/tpl/images/0726/6258/0f634.png)
, ![\left[\mathrm{H^{+}}\right]](/tpl/images/0726/6258/81ca8.png)
, and ![\left[\mathrm{CO_3}^{2-}\right]](/tpl/images/0726/6258/1667f.png)
denote the concentrations of the three species.
is the only product of this reaction. Besides, its coefficient in the balanced reaction is one. Therefore, the numerator would simply be 
.
" on the product side of this reaction. 
is equivalent to 
. The species 
appeared twice among the reactants. Therefore, its activity should also appear twice in the denominator:
.![\displaystyle K = \frac{\left(a_{\mathrm{H_2CO_3\, (aq)}}\right)}{\left(a_{\mathrm{H^{+}}}\right)^2\, \left(a_{\mathrm{{CO_3}^{2-}\, (aq)}}\right)} \quad\begin{matrix}\leftarrow \text{from products} \\[0.5em] \leftarrow \text{from reactants}\end{matrix}](/tpl/images/0726/6258/9745b.png)
.
" species. Note that all the three species here are indeed aqueous. Hence, this equilibrium constant expression can be approximated as:![\displaystyle K = \frac{\left(a_{\mathrm{H_2CO_3\, (aq)}}\right)}{\left(a_{\mathrm{H^{+}}}\right)^2\, \left(a_{\mathrm{{CO_3}^{2-}\, (aq)}}\right)} \approx \frac{\left[\mathrm{H_2CO_3\, (aq)}\right]}{\left[\mathrm{H^{+}\, (aq)}\right]^2\cdot \left[\mathrm{{CO_3}^{2-}\, (aq)}\right]}](/tpl/images/0726/6258/9131e.png)
.
Other questions on the subject: Chemistry
Chemistry, 22.06.2019 05:40, yah2muchh
Calculate: select the worksheet tab. this tab you calculate the analyte concentration. fill in the first set of boxes ("moles h2so4" and "moles naoh") based on the coefficients in the balanced equation. (if there is no coefficient, the value is 1.) record the appropriate volumes in the "ml naoh" and "ml h2so4" boxes. record the concentration of the titrant in the m naoh box. click calculate. what is the concentration listed
Answers: 2
Chemistry, 22.06.2019 07:50, mckinleesmomp6qj1e
Which of the following electromagnetic waves can create ions?
Answers: 2
Chemistry, 22.06.2019 22:30, vhife4901
Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.
Answers: 1
You know the right answer?
Write the equilibrium constant expression for this reaction: 2H+(aq)+CO−23(aq) → H2CO3(aq)...
Questions in other subjects:
Mathematics, 20.04.2021 01:40
Chemistry, 20.04.2021 01:40
History, 20.04.2021 01:40
Geography, 20.04.2021 01:40
Computers and Technology, 20.04.2021 01:40
