The right answers are highlighted but I do not know why they are right. For the
ID: 636688 • Letter: T
Question
The right answers are highlighted but I do not know why they are right. For the first one, I'm confused as to what stabilizing a charge would be and why it matters on the conjugate base. For the second one, I do not know how you tell which is weaker and which is stronger. Please help! Thank you!
7. Which is a stronger acid, NH3 or H20? A. NHs, because N is more electronegative than O, and therefore is better able to stabilize the charge B. C. D. on the conjugate base. ?H3, because N is less electronegative than O. and therefore is better able to stabilize the charge on the conjugate base H2O. because O is more electronegative than N. and therefore is better able to stabilize the charge on the conjugate base H20, because o is less electronegative than N, and therefore is better able to stabilize the charge on the conjugate base. 8. When this reaction occurs Do you think the final reaction mixture contains A. More reactants than products because H2o + NH3 are weaker acids and bases than OH +NH B. More reactants than products because HhO+NH are stronger acids and bases than TOH +NH4 C. More products than reactants because H20 +NHs are weaker acids and bases than OH+NH D. More products than reactants because H20+NH are stronger acids and bases than OH +NH4Explanation / Answer
1. Acidic means losing of proton. The greater the polarity of the bond greater is the acidity. Here O-H bond is more polar than NH bond due to more electronegativity of oxygen atom than the nitrogen. After losing the proton, Hydroxide is formed. The negative charge on hydroxide ion (conjugate base) is stabilized by more electronegative oxygen atom by pulling.
2. Generally, in acid base equilibrium reactions, equilibrium towards weak acid or weak base. Here H2O is weak acid than NH4+ and NH3 is weak base than OH-. Negatively charged species(OH-) are more basic than neutral species.
Hence equilibrium favors reactants.
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