Aluminum granules are a component of some drain cleaners because they react with sodium hydroxide to release both energy and gas bubbles to help clear the drain clog.

What mass (in grams) of hydrogen (H2) would be needed to produce 4L of hydrogen gas at 101kPa and 25C?

Question

Aluminum granules are a component of some drain cleaners because they react with sodium hydroxide to release both energy and gas bubbles to help clear the drain clog.  

What mass (in grams) of hydrogen (H2) would be needed to produce 4L of hydrogen gas at 101kPa and 25C?

whpalmer4 · Answer

Use $$PV = nRT$$to find the number of moles of H2 required, then convert to grams by multiplying by the molar mass of H2.