
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Determine the dissociation constants for arsenic acid at three dissociation stages given the equations and constants:

1. \( \mathrm{H}_{3} \mathrm{AsO}_{4} \leftrightarrow \mathrm{H}^{+} + \mathrm{H}_{2} \mathrm{AsO}_{4}^{-} \), with \( K_{\text{d1}} = 5.6 \times 10^{-3} \)
2. \( \mathrm{H}_{2} \mathrm{AsO}_{4}^{-} \leftrightarrow \mathrm{H}^{+} + \mathrm{HAsO}_{4}^{2-} \), with \( K_{\text{d2}} = 1.7 \times 10^{-7} \)
3. \( \mathrm{HAsO}_{4}^{2-} \leftrightarrow \mathrm{H}^{+} + \mathrm{AsO}_{4}^{3-} \), with \( K_{\text{d3}} = 2.95 \times 10^{-12} \)

Calculate the concentration of \( [\mathrm{H}^{+}] \) and \( [\mathrm{H}_{2} \mathrm{AsO}_{4}^{-}] \) for the first stage of dissociation. Then proceed to calculate for the second stage.

Present the answer in LaTex format: \boxed{Your answer}
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