Rank the following 0.100 M solutions in order of increasing H3O+ concentration:
HF, Ka = 6.3 × 10−4; HCN, Ka = 6.2 × 10−10; HOCl, Ka = 4.0 × 10−8

HF < HCN < HOCl

HCN < HOCl < HF

HOCl < HCN < HF

HF < HOCl < HCN

HOCl < HF < HCN

HCN < HOCl < HF  

Explanation:

The larger the Kₐ value, the stronger the acid.

6.2 × 10⁻¹⁰ < 4.0 × 10⁻⁸ < 6.3 × 10⁻⁴

   HCN      <     HOCl    <      HF

 weakest       stronger    strongest

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: