
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
The acidity and alkalinity of a solution is characterized by the $pH$ value. The calculation formula for $pH$ is $pH = -\log_{10} [H^{+}]$, where $[H^{+}]$ represents the concentration of hydrogen ions in the solution, with the unit being moles per liter (mol/L). The concentration of hydrogen ions in pure water is $[H^{+}] = 10^{-7}$ mol/L. Therefore, the $pH$ of pure water is _______.

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