Mole ConceptHard

Question

When 20 g Fe2O3 is reacted with 50 g of HCl, FeCl3 and H2O are formed. The amount of unreacted HCl is

(Fe = 56)

Options

A.27.375 g
B.22.625 g
C.30 g
D.4.75 g

Solution

Fe2O3 + 6HCl → 2FeCl3 + 3H2O

160 g 6 × 36.5 g

$\therefore 20\text{ g} \frac{6 \times 36.5}{160} \times 20 = 27.375\text{ g}$

Hence, the mass of unreacted HCl = 50 − 27.375 = 22.625 g

Create a free account to view solution

View Solution Free
Topic: Mole Concept·Practice all Mole Concept questions

More Mole Concept Questions

While resting, an average 70 kg human male consumes 16.628 L of oxygen per hour at 270C and 100 kPa. How many moles of o...A compound contains equal masses of the elements A, B and C. If the atomic masses of A, B and C are 20, 40 and 60, respe...A certain mixture of MnO and MnO2 contains 66.67 mol percent of MnO. What is the approximate mass percent of Mn in it? (...The number of g-molecules of oxygen in 6.023 × 1024 CO molecules is...A quantity of 12 g of magnesium is burnt completely in air (O2 = 20% and N2 = 80%, by volume). Which of the following is...