posted by Gabriella on .
How many milliliters of a 0.62 M HCl solution are needed to react completely with 4.7 g of zinc to form zinc(II) chloride?
Answer in units of mL
Write and balance the equation.
Zn + 2HCl ==> ZnCl2 + H2
mols Zn = grams/molar mass
Use the coefficients in the balanced equation to convert mols Zn to mols HCl.
Now M HCl = mols HCl/L HCl. Youhave mols HCl and M HCl, solve for L HCl and convert to mL.