The Reaction
The reaction between lithium and hydrogen chloride is:
2 Li + 2 HCl → 2 LiCl + H₂
Stoichiometry
The balanced equation tells us:
* 2 moles of lithium (Li) react with 2 moles of hydrogen chloride (HCl) to produce 2 moles of lithium chloride (LiCl) and 1 mole of hydrogen gas (H₂).
Calculation
Since we want to find out how many moles of HCl are needed for 1 mole of Li, we can set up a proportion:
2 moles HCl / 2 moles Li = x moles HCl / 1 mole Li
Solving for x:
x = 1 mole HCl
Answer: You need 1 mole of hydrogen chloride (HCl) to form 1 mole of lithium (Li).
