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Multiple Choice
For a solution that is 0.164 M NH3 and 0.110 M NH4Cl, what is the concentration of Cl- ions?
A
0.054 M
B
0.274 M
C
0.164 M
D
0.110 M
Verified step by step guidance
1
Identify the components of the solution: NH3 (ammonia) and NH4Cl (ammonium chloride). NH4Cl is a salt that dissociates completely in water.
Write the dissociation equation for NH4Cl: NH4Cl → NH4⁺ + Cl⁻. This shows that each mole of NH4Cl produces one mole of Cl⁻ ions.
Determine the initial concentration of NH4Cl, which is given as 0.110 M. Since NH4Cl dissociates completely, the concentration of Cl⁻ ions will be the same as the initial concentration of NH4Cl.
Conclude that the concentration of Cl⁻ ions in the solution is equal to the concentration of NH4Cl, which is 0.110 M.
Verify that the concentration of Cl⁻ ions is consistent with the complete dissociation of NH4Cl, confirming that the correct answer is 0.110 M.