A 0.14 M HNO₂ solution is 5.7% ionized.Calculate the H⁺ ion concentration. A)8.0 × 10^-3 M B)0.057 M C)0.13 M D)0.14 M E)0.80 M

Question

Quizplus · Accepted Answer

Since the solution is 5.7% ionized, we can assume that 5.7% of the HNO₂ has ionized into H⁺ ions. This means that the concentration of H⁺ ions is 5.7% of the initial concentration of HNO₂. H⁺ ion concentration = 0.057 × 0.14 M = 0.00798 M We write this in scientific notation: 0.00798 M = 7.98 × 10^-3 M, which is closest to answer choice A.

A 014 M HNO2 Solution Is 5

A 014 M HNO₂ Solution Is 5