It is an acid, but it is a weak acid because of its low first dissociation constant. Archived. Defines strong and weak acids and the acid ionization constant. Strength of an HA (HF, HCl, H2S) acid depends on the difference of electronegativity between H and A - the more electonegative is A the stronger the acid. ... im in the same class & our chem teacher didnā€™t teach us how to identify strong/weak bases/acids in this way yet. See also here. When we add a proton, we must conserve both mass and charge, we add H^+ to HPO_4^(2-) so the conjugate acid is simply H_2PO_4^(-). Acid strength is the tendency of an acid, symbolised by the chemical formula HA, to dissociate into a proton, H +, and an anion, A āˆ’.The dissociation of a strong acid in solution is effectively complete, except in its most concentrated solutions.. HA ā†’ H + + A āˆ’. Question: Why Is H3PO4 A Stronger Acid Than H3AsO4 ? could you explain further because we are still a little confused. Posted by. Close. EN Of As Is 2.0, And EN Of P Is 2.1. #1)hydrochloric acid is a relatively strong acid . (Hydrochloric, sulfuric, and nitric acids are stronger, but acetic acid is weaker). Why is HPO4-2 a weak acid? ==Clarification== Phosphoric acid is a weak acid, as it does not fully dissociate into its component ions. b)one product of this P 2 O 5 + 6 H 2 O -> 2 P 2 O 5 In the final step, high-pressure-drop demisters are used to remove the phosphoric acid mist from the combustion gas stream. imagine that HCl is added to a buffer solution containing the weak acid phosphoric acid and a salt a)will HCl react with weak acid (H3PO4), or will it react with the salt (Na2HPO4)? Examples of strong acids are hydrochloric acid (HCl), perchloric acid (HClO 4), nitric acid (HNO 3) and sulfuric acid (H 2 SO 4). 2. The product is then hydrated with water to form strong phosphoric acid (in the liquid state). HI because I is very electronegative and H3PO4 because the oxidation degree of P is 5+ (maximal possible degree of oxidation). I Thought The Larger Atom Size Of As Would Make H3AsO4 The Stronger Acid. thanks! As Is A Larger Atom Than P. Yes, P Has A Larger EN, But Not By Much. The steps of dissociation are below: H3PO4 --> H+ + H2PO4(-) Well, for one thing, the parent compound (phosphoric acid) is a weak acid to begin with. The conjugate acid of any species, is that species plus a proton; so it's H_2PO_4^(-). So, certainly, the conjugate base twice removed of phosphoric acid is going to be a weaker acid than it's bigger, stronger brother H3PO4. What is the conjugate acid of H_2PO_4^(-)? u/troyquack. If HPO4 2- is an acid, is it a strong acid or a weak one? Why is HPO4-2 a weak acid? 8 months ago.


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