To completely react 17g of barium hydroxide, how many grams of hydrochloric acid is needed?

Answer 1

Ba(OH)2 + 2HCl ==> BaCl2 _ 2H2O
mols Ba(OH)2 = grams/molar mass = ?
Using the coefficient sin the balanced equation, convert mols Ba(OH)2 to mols HCl.
Now convert mols HCl to grams. grams = mols HCl x molar mass HCl.