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Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place.
Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place.
Chemistry | Class 11 | Exercise 1 | NCERT | Some Basic Concepts of Chemistry
Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place.

Zn + 2HCl → ZnCl2 + H2

Calculate the volume of hydrogen gas liberated at STP when 32.65 g of zinc reacts with HCl. 1 mol of a gas occupies 22.7 L volume at STP; atomic mass of Zn = 65.3 u.

 

Calculation:

1 mole of gas occupies = 22.7l volume at STP

Atomic mass of Zinc (Zn) = 65.3u

65.3g of Zn when reacts with HCl produces 22.7L H2 at STP

Hence,

32.65g of Zinc when reacts with hydrochloric acid will produce 11.35L of H2 at STP.

i

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