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Which is more acidic and why h20 or H2S?
Assertion: H2S is more acidic than H2O. Reason: H-S bond is more polar than H-O. The more electronegative among the two will have a stronger bond and thus will be a weaker acid. Also, higher is the electronegativity, higher will be the bond polarity.
Which of the following is the strongest acid HBr HF H2S PH3?
The strongest acid is HBr.
Which is more acidic PH3 or HCl?
PH3 < H2S < HCl and. HClO4 < HClO3 < HCIO2 < HCIO .
Which is stronger acid HS or H2S?
The greater the ability of a species to accept a H+ from another species, the greater its base strength. Organic chemists customarily compare the strength of bases using the strengths of their conjugate acids, measured as pKa. HF is a stronger acid than H2S. Thus, HS ¯ is a stronger base than F ¯.
Why is H2S more acidic?
The electronegative of phosphorus is 2.2 and sulphur is 2.6. So, the electronegativity of sulphur is more than phosphorus and thus sulphur-hydrogen bond is more polar than phosphorus-hydrogen bond. So, the acidity of hydrogen sulphide is more than the acidity of phosphorus hydride.
Why is H2S acidic?
The size of central atom H2S is larger than that in H2O. S-H bond is larger and weaker than O-H bond H2O, hence H2S is more acidic than H2O.
Is H2S stronger than PH3?
H2S is a stronger acid than PH3 because S is more electronegative than P.
Is H2S a stronger acid than HBr?
Recall that the strengths of binary acids is based on the electronegativity or size of the nonmetal. In this case, we have two strong acids which are HCl and HBr, hence we can conclude that H2S is the weakest acid.
Why acidic strength decreases in the order HCl H2S PH3?
The acidic strength decreases because of decrease in polarity of E—H bond from H—Cl to P—H which is due to decrease in electonegativity of E. (ii) This is due to inert pair effect. The stability of +5 oxidation state decreases down the group in group 15.
Why H2O is liquid and H2S is gas?
H2O is liquid because of its ability to form hydrogen bonds which is possible only in case of F , O and N because of their high electronegativity. While in case of H2S there is no hydrogen bond formation . Hence H20 is liquid while H2S is gas .
Is PH3 basic or acidic?
Hello! PH3 is a weaker base than NH3 because the lone pair within NH3 has a higher energy and thus serve better as a better base. Each subsequent fall on the periodic table has less energy and thus becomes less basic which in turn means it is more acidic.
Why is H2S a stronger acid than PH3?
As S is more electronegative than P, conjugate base HS- is more stable than H2P- Hence, H2S is stronger acid than PH3. Please log in or register to add a comment.
Which is more acidic – s or P?
S which is more acidic and why? because S is more electronegative than P. Due to higher electron negativity difference S −H bond is more polar than P −H bond resulting in easier removal of H + ion. Was this answer helpful?
Is hydrogen sulphide more acidic than water?
Yes hydrogen sulphide is more acidic than water because after losing proton the conjugate base of hydrogen sulphide is more stable than that of conjugate base of water. after losing H2S becomes HS – while H2O becomes HO-….
What determines the strength of an acid?
The higher the Ka, the stronger the acid. HF is stronger. F is certainly more electronegative than S, but there are other factors that dictate the strength of an acid other than electronegativity. One can say that The stronger an acid is, the more easily it loses a proton, H+.