Question

10.0 g H2O reacts with 4.5 g Na to produce NaOH and H2. Identify the limiting reactant. *

Answer 1

$2Na+2H_2O\to 2NaOH+H_2$

moles of sodium=$4.5/23=0.1957moles$

moles of water = $10/18=0.5556moles$

Moles of sodium are less than moles of water hence it is the limiting reactant.