Some drain cleaners contain a mixture of sodium hydroxide and aluminum which reacts with water as follows:

Question

Some drain cleaners contain a mixture of sodium hydroxide and aluminum which reacts with water as follows:
2Al(s)+2 NaOH(aq)+6H2O(l)->2Na[Al(OH)4](aq)+3H2(g)
What mass of hydrogen gas can be produced when 5g Al reacts with sufficient NaOH and H2O) according to the above equation?

bobpursley · Answer

According to the equation, for each mole of aluminum, one gets 3 moles of H2. So how many moles of Al is 5 grams? You ought to get three times that.