Worksheet: Equivalents and Limiting Reagents

In this worksheet, we will practice calculating the number of equivalents of reactants and using reaction stoichiometry to identify limiting reagents.

Q1:

What mass of sodium carbonate is needed to neutralise 5.92 kg of nitric acid?

  • A 4.23 kg
  • B 7.80 kg
  • C 5.11 kg
  • D 4.98 kg
  • E 5.75 kg

Q2:

Airbags are inflated by decomposing sodium azide ( N a N ) 3 to produce nitrogen gas, as shown in the equation.

What mass of sodium azide is required to produce 51.8 L of nitrogen gas with a density of 1.25 g/L?

  • A 66.8 g
  • B 144 g
  • C 96.2 g
  • D 100 g
  • E 75.4 g

Q3:

Saccharin is a compound of carbon, hydrogen, nitrogen, oxygen, and sulfur:

C C H C C H C C H C S O N H O O H

To 2 significant figures, how many molecules of saccharin can be prepared from 30 C atoms, 25 H atoms, 14 N atoms, 12 O atoms, and 8 S atoms?

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