Exam 18: Two Classes of Chemical Reactions

An acid and a base react to form a salt,which consists of positive and negative ions.Which forms the positive ions: the acid or the base? Which forms the negative ions?

Which of the following statements describes a basic solution?

Why is the air over an open flame always moist?

How does an atom's electronegativity relate to its ability to become oxidized?

What is the primary difference between a fuel cell and a battery?

What happens to the pH of an acidic solution as water is added?

Lakes lying in granite basins,such as those in the northeastern U.S.,tend to become acidified by acid rain more readily than lakes lying in limestone basins,such as those found in the midwestern U.S.Why is this so?

How do you make a proton out of a hydrogen atom?

Which of the following statements about oxidation and reduction reactions is true?

For the following reaction,identify whether the compound in bold is behaving as an acid or a base. H₃PO₄ + H₂O ⇌ H₂PO₄^- + H₃O⁺

Identify the acid or base behavior of each substance in these reactions: $\mathrm { H } _ { 3 }$ $\mathrm { O } ^ { + }$ + $\mathrm { Cl } ^ { - }$ ? $\mathrm { H } _ { 2 }$ O + HCl

What is the purpose of the salt bridge in a voltaic cell?

Which of the following describes an electrode?

Which element is closer to the upper right corner of the periodic table,the one indicated by the lighter colored atoms or the darker colored atoms?

In a battery,the following oxidation-reduction reaction is taking place: Mn₂O₃ + ZnO → 2 MnO₂ + Zn What is undergoing reduction as written?

As the hydronium ion concentration increases,the pH

Which of the following statements describes a neutral solution?

According to the following reaction,which molecule is acting as an acid? H₃O⁺ + HSO₄^- → H₂O + H₂SO₄

If you had a 1 M solution of a weak base what would be its pH?

For the following reaction,identify whether the compound in bold is behaving as an acid or a base. H₃PO₄ + H₂O ⇌ H₂PO₄^- + H₃O⁺