<P> The other way to measure acid strength is to look at its fractional dissociation, which is symbolized as α (alpha) and which can range from 0% <α <100% . The dissociation ratio is defined as </P> <Dl> <Dd> α = (A −) (A −) + (HA) (\ displaystyle (\ ce (\ alpha = (\ frac ((A ^ (-))) ((A ^ (-)) + (HA)))))) </Dd> </Dl> <Dd> α = (A −) (A −) + (HA) (\ displaystyle (\ ce (\ alpha = (\ frac ((A ^ (-))) ((A ^ (-)) + (HA)))))) </Dd> <P> Unlike K, α is not constant and does depend on the (HA). In general, α will increase as (HA) decreases . Thus acids become stronger as they are diluted . If acids are polyprotic, then each proton will have a K. For example: H CO + H O → HCO + H O has two K values because it has two acidic protons . The first K value is 4.46 × 10 (pK = 6.351) and the second is 4.69 × 10 (pK = 10.329). </P>

How the strength of basic solution can be increased