Question 1

Which are the Brønsted-Lowry acids in the following equilibrium?

CH3COOH + C2H5COOH ⇌ CH3COO- + C2H5COOH2+

  A  

CH3COOH and C2H5COOH

  B  

CH3COOH and C2H5COOH2+

  C  

C2H5COOH2+ and CH3COO-

  D  

CH3COO- and C2H5COOH2+

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Question 2

Ammonia reacts with water in a reversible reaction. Which are the Brønsted-Lowry bases?

  A  

H2O and OH-

  B  

NH3 and OH-

  C  

NH4+ and OH-

  D  

NH4+ and NH3

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Question 3

Which two solutions, both of concentration 0.10 mol dm-3, have been used to produce this titration curve?

  A  

HCl(aq) and KOH(aq)

  B  

HCOOH(aq) and KOH(aq)

  C  

HCl(aq) and NH3(aq)

  D  

HCOOH(aq) and NH3(aq)

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