How many moles of HCl would it take to produce 10 moles of H2O in the following equation and why? 2HCl + Ca(OH)2 -- CaCl2 + 2H20 ? So the molar mass of H2O is 18.01528 g/mol and the molar mass of HCl is 36.46094, right?

Question

How many moles of HCl would it take to produce 10 moles of H2O in the following equation and why? 2HCl + Ca(OH)2 --> CaCl2 + 2H20 ? So the molar mass of H2O is 18.01528 g/mol and the molar mass of HCl is 36.46094, right?

anonymous · Answer

I would just leave the answer in moles because it's less work and use some stoichiometry.  $$10 mol h_2O(\frac{2 mol HCl}{2 mol H_2O})=10 molHCl$$

So you see that moles of h20 cancel leaving you with mol of HCl which is what the question ask for.

 Boom! ZBay out!