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$HF$ is classified as a weak acid, and $HCl$ is a strong acid.
Which of the following statements gives the best explanation for this difference in acid strength?
The molar mass of $HF$ is less than the molar mass of $HCl$.
The $H-F$ bond requires more energy to break than the $H-Cl$ bond.
A solution of 1 M $HF$ has a lower pH than a solution of 1 M $HCl$.
The solubility of $HF$ in water is less than the solubility of $HCl$ in water.