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Author Question: Explain the term amphoteric. Use the hydrogen carbonate ion, HCO3- to illustrate amphoteric ... (Read 149 times)

itsmyluck

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on: Aug 27, 2018
Explain the term amphoteric. Use the hydrogen carbonate ion, HCO3- to illustrate amphoteric behavior.
 
  What will be an ideal response?

Question 2

The normality of a solution prepared by dissolving 50.0 g of Ca(OH)2 in water to make 250. mL solution is ________ N.
 
  A) 1.35
  B) 2.70
  C) 3.51
  D) 5.40
  E) 7.02


Bsand8

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Reply #1 on: Aug 27, 2018
Answer to Question 1

An amphoteric compound or ion is one that can behave either as an acid or a base in solution, depending on the chemical environment. In reaction (1 ), it acts as an acid by donating a hydrogen ion. In reaction (2 ), it acts as a base by accepting the hydrogen ion.
(1 ) HCO3- (aq) + H2O (l) = HCO+ (aq) + CO32- (aq)
(2 ) HCO3- (aq) + H2O (l) = H2CO3 (aq) + OH- (aq)

Answer to Question 2

D


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itsmyluck

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Reply #2 on: Aug 27, 2018
Both answers were spot on, thank you once again


Bsand8

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Reply #3 on: Aug 27, 2018
Great! Please up vote :D


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