stronger acid has higher pka?
310337
Strong acids are defined by their pKa. The acid must be stronger in aqueous solution than a hydronium ion, so its pKa must be lower than that of a hydronium ion. Therefore, strong acids have a pKa of <-174. Strong acids can be organic or inorganic.
987570
HI has longer bond than HCl, making its bond weaker. Therefore it is easier for HI to lose H+, making it a stronger acid.
67313
HCl is a stronger acid than H2SO4 because a proton more easily separates from chloride ion than from hydrogen sulphate ion and this is reflected in their dissociation constants. The lower the pKa value of an acid the stronger it is. The pKa values of HCl and H2SO4 are -6 and -3 , respectively.
660166
The pH at the half-titration point is equal to the pKa of the weak acid, BH+. To get the pKb of the base (B) you MUST subtract the pKa from 14. The reason for this is that the pOH is actually what equals the pKb.
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The reason pKa is used is because it describes acid dissociation using small decimal numbers. The same type of information may be obtained from Ka values, but they are typically extremely small numbers given in scientific notation that are hard for most people to understand.
1396236
a. HNO3 is more acidic than HNO2 because as the number ofoxygen atoms attached to the N atom increases, they become moreeffective at withdrawing electron density from the O-H, therebyweakening and polarizing it. This increses the tendency for themolecule to produce a proton, and so its acid strengthincreases.
1062564
The sulfonic, phosphoric, and carboxylic acid groups are the strongest acids. Many functional groups behave as weaker acids.
1019320
pH and pKa pH depends on the concentration of the solution. ... For example, concentrated vinegar (acetic acid, which is a weak acid) could have a lower pH than a dilute solution of hydrochloric acid (a strong acid). On the other hand, the pKa value is constant for each type of molecule. It is unaffected by concentration.
450511
If you see any other acid or base than one of these strong ones it will be a weak acid or base (unless I specifically say otherwise in the problem). The 7 common strong acids are: HCl, HBr, HI, HNO3, HClO3, HClO4 and H2SO4 (1st proton only).
1217022
Squaric acid has a pK of 1.5. making it much more acidic than many carboxylic acids (typical pKa values of 4- 5). One of the reasons for its acidity is resonance stabilization of its conjugate base, which is shown below.
998963
Similarly, N is larger than O, and thus the N-H bond is longer than the O-H bond. And longer bonds means less strength. But, for acidity, O-H is the strongest acid of the 3, even though the O-H is the strongest bond.
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Since HI is the strongest acid, Iodide ion will be the weakest conjugate base within the group. So the order for increasing basic character is I<Br<Cl<F. ... Hence it will be a better leaving group than flouride ion.
1087870
HCl is a stronger acid than HF because fluorine is more electronegative than chlorine.
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Salts can have acidic or basic pKa depending on the strength of original acid and bases from which they are derived. In this case Zn(OH)2 is a weak base and H2SO4 is a strong acid; therefore ZnSO4 has acidic pKa.
568239
HCl, HBr, and HI are all strong acids, whereas HF is a weak acid. The acid strength increases as the experimental pKa values decrease in the following order: HF (pKa = 3.1) < HCl (pKa = -6.0) < HBr (pKa = -9.0) < HI (pKa = -9.5).
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Nitric acid is a stronger acid than nitrous acid because its conjugate base is more stable. The NO3- ion has excess negative charge spread out over 3 oxygen atoms while the excess negative charge in NO2- is spread out over on 2 oxygen atoms.
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HI is a stronger acid than HF because although fluorine is more electronegative and attaracts hydrogen's electron more than iodine but it is a poor leaving group. ... Hence due to much much lower dissociation enthalpy hydroiodic acid is a stronger acid than hydrofluoric acid.