QUESTION 16

Magnesium reacts with nitric acid ([tex]\(HNO_3\)[/tex]) to produce hydrogen gas. Which of the following will result in the fastest reaction?

A. Lumps with dilute acid at 40°C
B. Powder with dilute acid at 20°C
C. Lumps with concentrated acid at 20°C
D. Powder with concentrated acid at 20°C

QUESTION 17



Answer :

Final answer:

The balanced chemical equation for the reaction of magnesium carbonate with nitric acid is provided, along with two ways to increase the rate of hydrogen gas production are explained.


Explanation:

The balanced chemical equation for the reaction: MgCO3(s) + 2HNO3(aq) → Mg(NO3)2(aq) + H2O(l) + CO2(g)

Two ways to increase the rate of H2(g) production:

  1. Using powdered magnesium instead of lumps to increase surface area.
  2. Increasing the concentration of the acid used.

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