# Problem: How many liters of hydrogen gas are collected over water at 18°C and 725 mmHg when 0.84 g of lithium reacts with water? Aqueous lithium hydroxide also forms.

###### FREE Expert Solution

We’re being asked to calculate the volume of the H2 gas produced from a reaction that is collected over water.

Let's first calculate the Partial Pressure of hydrogen gas:

Given:            Total Pressure (Ptotal) = 725 mmHg

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###### Problem Details

How many liters of hydrogen gas are collected over water at 18°C and 725 mmHg when 0.84 g of lithium reacts with water? Aqueous lithium hydroxide also forms.