Question

When 6 g of granulated Zn is added to a solution of 2 M HCl in a beaker at room temperature, hydrogen gas is generated. How would the rate be affected if, at constant volume of the acid, 6 g of powdered Zn is used. The rate of hydrogen gas evolution will be ______.

Answer 1

Answer: increased

Explanation:

Powdered zinc has a greater surface area than zinc granules. If the same mass of zinc and volume of acid is used, it will be observed that the powdered zinc will react faster since it provides a greater surface area for reaction compared to zinc granules. The greater the available surface area of reactants, the greater the rate of reaction. Higher surface area means that more particles are available for reaction.