why in this order? Assertion: HClO 4 is a stronger acid than HClO 3. So shouldn't HClO3 definitely be stronger than HCl? HClO and ClO− are oxidizers, and the primary disinfection agents of chlorine solutions. Reason : Oxidation state of Cl in HClO 4 is +8 and in HClO 3 +5. HI dissapates more than HCl in acetic acid because the anion I -1 is larger than Cl -1. Assertion: HClO 4 is a stronger acid than HClO 3. Wouldn't the electron withdrawing effect of the chlorine in hypochlorite make it less reactive therefore the stronger acid? Hypochlorous acid (HOCl or HClO) is a weak acid that forms when chlorine dissolves in water, and itself partially dissociates, forming hypochlorite, ClO−. Visit BYJU’S – The Learning App to know more about the structure and properties of hydrofluoric acid. also, why is H3PO4 a stronger acid than H3AsO4 since As is a larger atom than P?? As the number of oxygens increases as you go from HClO to … Is HBrO4 strong or weak? HClO4 is more acidic than HClO3 because of the following reasons: pKa of HClO4 (-10) is lower than HClO3 (-1).Acids with lower pKa are stronger. So H2SO4 is seems stronger.But in another way in water HCl … HClO is a stronger acid than HBrO because the resulting anion of That's still I have some confusion. Feb 14,2021 - A : HClO4 is a stronger acid than HClO3 .R : Oxidation state of Cl in HClO4 is +7 and in HClO3 is +5.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and Consider the resulting conjugate base for each ionisation, ClO 3 - can have the negative charge shared among more atoms than ClO 2 - (see below), hence ClO 3 - is more stable as an anion, meaning that HClO 3 is more likely to ionise than HClO 2 , thus being the stronger acid. HClO 3 is a stronger acid than HClO 2 because the H-O bond in HClO 3 is more polar than the H-O bond in HClO 2 HF is a stronger acid than HCl because HF is a more polar bond than HCl H 3 PO 4 is a stronger acid than H 2 SO 4 because there are more ionizable hydrogens in H 3 PO 4 A strong acid is one that completely ionizes (dissociates) in a solution HCl is ionized completely while H2SO4 is ionized partially. HCl is more stronger than HNO3 as PH value of HCL IS 1 and that of HNO3 is somewhat greater than this!! Is there a way to memorize? (a) Account for the following : (i) Reducing character decreases from SO 2 to TeO 2. Yes, Hydrochloric acid (HCl) is a stronger acid than Hydrofluoric acid (HF). The definition of an acid is a substance which dissociates to give H3O+ ions. Thanks! In HClO 3 and HClO 2, HClO3 has more oxygen therefore it is more acidic. to know what acid is stronger than the other by the chemical formula. Why is HCl a stronger acid than HClO? Besides, O is more electronegative than Cl, so it Using resonance to explain—ClO4- is a more stable conjugate base than ClO3- because it has more resonance structures as follows: Even though both a strong acids, why is HCl a stronger one? hope this helps you, regards, akshu:):):) both the acids are very strong but if we compare these two acids, HCl is Hence, the acidic strength increases in the order: HClO HClO 2 HClO 3 HClO … Oxygen is more electronegative than chlorine. Shouldn't acid strength INCREASE with the number of oxygens, because oxygens help withdraw electron density from O-H bond? The World’s Strongest Acid The record-holder used to be fluorosulfuric acid (HFSO3), but the carborane superacids are hundreds of times stronger than fluorosulfuric acid and over a million times stronger than … HClO 4 ClO 4 -Perchlorate ion 3.2 * 10 9 Hydroiodic acid HI I-Iodide 1.0 * 10 9 Hydrobromic acid HBr Br-Bromide 1.3 * 10 6 Hydrochloric acid HCl Cl-Chloride 1.0 * 10 3 Sulfuric acid H 2 SO 4 HSO 4-Hydrogen sulfate ion 2.4 * 10 1 Is HCl stronger than HClO2? Arrange these acids from weakest to strongest: HClO2, HCN, HF, HCl Ik the order is : HCN < HF < HClO2 < HCl but how exactly does one come to that conclusion with no necessary given information (Ka values?). HI and HCl are not stronger than CH 3 COOH 2 +, the conjugate acid of acetic acid. Is it because the conjugate base of HClO isn't as great of a nucleophile? While both the answers below describe the basic concept of what makes an acid “strong” or “weak” by the discussion of dissociation, I’m going to delve deeper and discuss what are the physical forces that make an acid Dil You can never tell HCl is Stronger than H2SO4, because H2SO4 can donate two protons in reaction. The larger the difference in the electronegativity between X and H atoms, the easier it is to form H + and X- 2. With an increase in the number of O atoms attached to C l, more electrons are pulled away from O − H bond and more weaker becomes the O − H bond. Justify Ans : 1. HBr is a stronger acid than HCL, even though Cl is more electronegative than Br. (iii) Xenon forms compound with fluorine and oxygen only. Also, O-H bond is more electronegative than H-Cl. Why not HClO4 > HClO3 > HCl? HF is a weak acid, but very dangerous (you may hear it etches glass, that’s because the SiF bond is the strongest bond) HCl and the rest of them (HBr, HI) are all “strong acids” but HI is the strongest (see pKa’s below) Due to poor orbital overlap (Iodine is much larger than H, and therefore the electrons are not very well shared, which imparts an extremely ionic character to the molecule) HClO4 > HCl > HClO3. I want to know why HCl is a much stronger acid than H2O.They have similar bond energies (H-Cl = 427 kJ/mol, O-H = 467 kJ/mol), so there should be easy to ionize both. So, in the case of acids consisting of an H atom and a nonmetal ion, the effect of radius of the anion is greater than the effect of the electronegativity. Eq lies on side opposite the HClO 2 (i.e. HClO2 is a stronger acid than HClO. 21. This increases the acid H C l HCl acid is stronger than highly concentrated acetic acid. Similarly, in this series ClO 4-is the weakest base (maximum stabilized) and its conjugate acid HClO 4 is the strongest acid. Solution for HClO ("H" C l O) is a stronger acid than HClO2 ("H" C l O2). or a trick? Compare HCl with H 2 S: HCl is a stronger acid than H 2 S. Acids become stronger as the X-H bond becomes more polar. Reason : Oxidation state of Cl in HClO 4 is +8 and in HClO 3 +5. (ii) HClO 3 is a stronger acid than HClO. on reactant side); thus, [Reactants] > [Products] and K < 1. If both assertion and reason are true and reason is … Advertisement Remove all ads Solution Show Solution Strength of an acid is the measure of concentration of hydronium ions it produces in its aqueous solution. Hence, the acidic strength increases in the order: HClO HClO 2 HClO 3 HClO … ; (c) a) The more terminal O there is, the stronger the acid (HClO 3 has 2, HClO 2 has 1). If both assertion and reason are true and reason is … Also there are more number electronegative oxygen atoms in case of $\ce{HClO4}$ , so acidity should be more. As the number of oxygens increases as you go from HClO to HClO4, the oxidation number of Cl increases. HF (Hydrofluoric acid) is a weak acid, but you can't store it in glass bottles as it will dissolve the glass. HBr (Hydrobromic Acid) has a larger radius and is therefore STRONGER than HCl (Hydrochloric Acid) as evidenced by their respective Ka values, which can be used as guide of Acid Strength. Which acid is strongest? (a) (i) Reducing character decreases from SO 2 to TeO 2 since down the group with an increase in the size of the central atom there is decrease electronegativity and metallic character increase. So the easier it is to release a proton in an aqueous solution, the stronger is the acid. $\ce{HClO4}$ is stronger acid due to the formation of more stable conjugate base.