Advertisements
Advertisements
प्रश्न
The pKa value of HCl is −7.0 and that of HI is −10.0. Which is the stronger acid?
Advertisements
उत्तर
pKa is the negative logarithm of the acid dissociation constant (Ka):
pKa = −log10(Ka)
Lower pKa ⇒ higher Ka ⇒ stronger acid
pKa of HCl = −7.0
pKa of HI = −10.0
Since −10 < −7, HI has a lower pKa, so it has a higher Ka.
The smaller the pKa value, the greater its acidity. Hence, HI is a stronger acid than HCl.
APPEARS IN
संबंधित प्रश्न
Select appropriate answers for the following.
Stability of interhalogen compounds follows the order _______.
Select appropriate answers for the following.
In which of the following pairs, molecules are paired with their correct shapes?
Answer the following.
Write the order of the thermal stability of the hydrides of group 16 elements.
Answer the following.
What is the oxidation state of Te in TeO3?
Answer the following.
What is the action of bromine on magnesium metal?
Complete the following.
\[\ce{ICl3 + H2O -> \underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{} + ICl}\]
Complete the following.
BrCl + H2O → _______ + HCl
Complete the following.
Cl2 + ClF3 → _______
Complete the following.
H2C = CH2 + ICl → _______
Complete the following.
\[\ce{XeF4 + SiO2 -> {..........} + SiF4}\]
Complete the following.
\[\ce{XeF6 + 6H2O -> \underline{}\underline{}\underline{}\underline{} + HF}\]
Answer the following.
Give two reactions showing the oxidising property of concentrated H2SO4.
Describe the manufacturing of H2SO4 by the contact process.
Write the order of ionic character of halides with monovalent metal (M).
____________ and ____________ are the rarest elements of the group 18.
Which one of the following ions has same number of unpaired electrons as those present in V3+ ion?
What is the highest oxidation state possessed by phosphorus in it's oxyacids?
Which of the following statement is CORRECT?
Which is the lowest oxidation state possessed by chlorine in it's oxyacids?
Arrange the following in the increasing order of their acidic strength.
The most stable +2 oxidation state is exhibited by ______.
Which halide of magnesium has highest ionic character?
What is the oxidation number of gold in the complex [AuCl4]1−?
Consider the following reaction.
I. \[\ce{Na2B4O7 ->[760° C] {...A...} + B2O3}\]
II. \[\ce{Si + KOH + H2O ->{...B...} + H2\uparrow}\]
III. \[\ce{P2O5 + HNO3 -> HPO3 + {...C...}}\]
IV. \[\ce{NH3 + Cl2(excess) -> {...D...} + HCl}\]
Identify the missing products of the given reactions.
Arrange the halogen acids in the decreasing order of acidic strength.
What is the action of H2 on elements of group 17?
