Answer :
Answer:
1. HBr>HCl> H2S >BH3
2.K_a1 very large — H2SO4
K_a1= 1.7 x 10^−2 — H2SO3
K_a1 = 1.7 x 10^−7 — H2S
Explanation:
As one goes down a row in the Periodic Table the properties that determine the acid strength can be observed.
The atoms get larger in radius meaning that in strength, the strength of the bonds get weaker, conversely meaning that the acids get stronger.
For the halogen-containing acids above following the rows and periods, HBr has the strongest bond and is the strongest acid and others follow in this order.
HBr>HCl> H2S >BH3
Acid Dissociation Constant provides us with information known as the ionization constant which comes in handy to measure the acid's strength. The meaning of the proportions are thus, the higher the Ka value, the stronger the acid i.e. it liberates more number of hydrogen ions per mole of acid in solution.
In solution strong acids completely dissociate hence, the value of dissociation constant of strong acids is very high.
Following the cues above on Ka;
K_a1 very large — H2SO4
K_a1= 1.7 x 10^−2 — H2SO3
K_a1 = 1.7 x 10^−7 — H2S
The decreasing order for the acid strength has been, HBr > HCl > [tex]\rm H_2S[/tex] > [tex]\rm BH_3[/tex].
The acid strength has been defined as the dissociation of the compound for the release of hydrogen ion in the sample.
Acid Strength across periodic table
In the periodic table, the larger the radius the weaker bond strength, the easier will be the release of ions, and thereby contribution to the acid strength.
In a periodic table, on moving down the group the bond has been weaker with the increase in the radius there has been a weak intermolecular force and thus higher acid strength.
The decreasing order for the acid strength has been, HBr > HCl > [tex]\rm H_2S[/tex] > [tex]\rm BH_3[/tex].
The acid strength for the basis of acid dissociation constant has been given, as the increase in acid strength there has been an increase in acid dissociation constant.
The acid dissociation constant for the following compounds has been:
[tex]\rm H_2S=Kal;\;1.7\;\times\;10^-^7\\H_2SO_3=Kal;1.7\;\times\;10^-^2\\H_2SO_4=Kal;very large[/tex]
For more information about acid dissociation constant, refer to the link:
https://brainly.com/question/16901512