Question

Muriatic acid, an industrial grade of concentrated HCl, is used to clean masonry and cement. Its concentration is 11.7 M. For routine use, a diluted solution of 3.50 M is prepared. How many milliliters of 3.50 M muriatic acid solution contain 41.5 g of HCl?

______ mL

Answer 1

Molar mass of HCl = 1*MM(H) + 1*MM(Cl)

= 1*1.008 + 1*35.45

= 36.458 g/mol

mass of HCl = 41.5 g

we have below equation to be used:

number of mol of HCl,

n = mass of HCl/molar mass of HCl

=(41.5 g)/(36.458 g/mol)

= 1.138 mol

we have below equation to be used:

M = number of mol / volume in L

3.5 = 1.138/ volume in L

volume = 0.325227 L

volume = 325 mL

Answer: 325 mL