Circle the correctanswer to each question below. ( a )Circle the stronger acid i

Question

Circle the correctanswer to each question below.

(a)Circle the stronger acid is the following pair: Benzoic acid(HC7H5O2)  or    Formic acid (HCHO2)

(b)Circle the stronger base:    C7H5O2    or    CHO2

(c)Predict whether an aqueous solution of Fe(NO3)3 iseither:    Acidic or   Basicor   Neutral

(d)Predict whether an aqueous solution of NH4CN iseither:   Acidic or Basic or Neutral

(e)Predict whether an aqueous solution of NH4ClO4is either: Acidic or Basic orNeutral

(f)Predict whether an aqueous solution of Na2CO3is either: Acidic or Basicor Neutral

Explanation / Answer

a)  Formic acid (HCHO2) isstronger acid than   Benzoic acid (HC7H5O2) as ithas greater Ka value. b)  C7H5O2  is strong base thanCHO2 as it has weak conjugateacid  Benzoic acid (HC7H5O2). c) Fe(NO3)3 is a neutral solution. d) NH4CN solution is basic because cyanide ionhas greater Kb value than the Ka of Ammoniumion.    e)  NH4ClO4 solution is acidic because Ammoniumion has greater Ka value than the Kb of perchlorateion. f) Na2CO3 solutionis basic because it contains conjugate base(carbonate) ofweak acid (bicarbonate). c) Fe(NO3)3 is a neutral solution. d) NH4CN solution is basic because cyanide ionhas greater Kb value than the Ka of Ammoniumion.    e)  NH4ClO4 solution is acidic because Ammoniumion has greater Ka value than the Kb of perchlorateion. f) Na2CO3 solutionis basic because it contains conjugate base(carbonate) ofweak acid (bicarbonate).

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