Calculate the mass of lithium hydroxide that must be added to 50ml of water so that it may react exactly with 5ml solution of 1.5M nitric acid.

Answer 1

Write and balance the equation.
LiOH + HNO3 ==> LiNO3 + H2O

How many moles HNO3 do you have? That's M x L = ?
How many mols LiOH is that? Since 1 mol LiOH = 1 mol HNO3, mols LiOH = mols HNO3 (from the equation).
mass LiOH = mols LiOH x molar mass LiOH.