ise kai tarike se samajh sakte hisaro ke structure bnao, H nikal ke O pe -ve charge lga do conjugate base bn jayega. ab jitna stable conjugate base hoga, utna hi stable wo acid hoga, kyuki koi bhi apna H+ tabhi dega agar wo aisa krne se stable hota hi. to ab apne ko dikhega ki H3PO4 me sabse jada resonance ho raha hi to wo sabse jada stable bn rha hi, uspe -ve charge most stable hi, isiliye most Acidic hi, aise hi bna lo.

Introduction

The order of acidic strength for phosphoric acid (H3PO4), phosphorous acid (H3PO3), and hypophosphorous acid (H3PO2) is H3PO4 > H3PO3 > H3PO2. This can be explained through various factors that determine the strength of an acid.

Explanation

1. Number of ionizable hydrogen atoms:
H3PO4 has three ionizable hydrogen atoms, while H3PO3 and H3PO2 have two and one, respectively. The more ionizable hydrogen atoms an acid has, the stronger it is. Therefore, H3PO4 has the most acidic strength due to its more ionizable hydrogen atoms.

2. Bond strength:
The bond strength between hydrogen and phosphorus in H3PO4 is weaker than in H3PO3 and H3PO2. The weaker the bond, the easier it is for hydrogen to dissociate and form hydrogen ions. This means that H3PO4 has a stronger acidic strength.

3. Oxidation state of phosphorus:
The oxidation state of phosphorus in H3PO4 is +5, while in H3PO3 and H3PO2 it is +3 and +1, respectively. The higher the oxidation state of phosphorus, the more acidic the acid is. Therefore, H3PO4 has the highest acidic strength.

Conclusion

In conclusion, the order of acidic strength for phosphoric acid, phosphorous acid, and hypophosphorous acid is determined by the number of ionizable hydrogen atoms, bond strength, and oxidation state of phosphorus. H3PO4 has the highest acidic strength due to having more ionizable hydrogen atoms, weaker bond strength, and higher oxidation state of phosphorus.