关于平衡常数equilibrium constant （Ka)的问题

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(i)HF is the strongest acid since it has the largest value of Ka.HF酸性最强,因为它平衡常数最大.
(ii)HS- is the weakest acid since it has the smallest value of Ka.HS- 酸性最弱,因为它平衡常数最小.
(iii)F- is the conjugate base of HF.F-是HF的共轭碱.
(iv)HF(the strongest acid) has the weakest conjugate base.HF是最强的酸,它有最弱的共轭碱.
(v)HS- (the weakest acid) has the strongest conjugate base.HS-是最弱酸,它有最强的共轭碱.
以下是解答这五道题的思路依据：
(i)(ii)The lager the value of Ka,the stronger the acid.平衡常数越大,酸性越强.
(iii)Every acid has a conjugate base,formed by removing a proton from the acid.每种酸都有一个与之对应的共轭碱,此共轭碱的化学式是将原来那种酸的化学式去掉一个质子（氢离子）.
(iv)(v)The stronger an acid,the weaker is its conjugate base; the stronger a base,the weaker is its conjugate acid.一种酸的酸性越强,它的共轭碱就越弱；一种碱的碱性越强,它的共轭酸就越弱.