Unit 4 Flashcards
description of a solution?
A solution is a homogeneous mixture of two or more substances.
A solution may be a gas, solid, or liquid.
which one of these compounds is insoluble in water?
AgBr
What is the oxidation number of Cr in Cr2O72–?
+6
What is oxidized in the following reaction?
Fe + Ag2O → FeO + 2 Ag
Fe
What is the reducing agent in the following reaction?
5 Fe2+(aq) + MnO4–(aq) + 8 H+(aq) → 5 Fe3+(aq) + Mn2+(aq) + 4 H2O(l)
Fe2+
Which salt is produced by the neutralization of hydrobromic acid with magnesium hydroxide?
MgBr2
Which of these compounds is a strong electrolyte ?
-O2
-C6H12O6 (glucose)
-H2SO4
-H2O
-CH3COOH (acetic acid)
H2SO4
Which accurately characterizes all non-electrolyte solutions?
-Nonelectrolyte solutions conduct electricity.
-Nonelectrolyte solutions do not conduct electricity.
-Nonelectrolyte solutions contain molecules.
-Nonelectrolyte solutions react with other solutions.
-Nonelectrolyte solutions conduct heat.
Nonelectrolyte solutions do not conduct electricity.
is defined as the maximum amount of solute that will dissolve in a given quantity of solvent at a specific temperature?
solubility
Which of these chemical equations does not describe a redox reaction?
2 LiOH(aq) + H2SO4(aq) → Li2SO4(aq) + 2 H2O(l)
Which substance is present in the smallest proportion in a solution?
solute
Which element is reduced in the following reaction?
Cu + 2 H2SO4 → CuSO4 + SO2 + 2 H2O
S
which one of these compounds is soluble in water?
-Na2S
-Ag2S
-BaCO3
-Hg2Cl2
-Ag2CO3
Na2S
Which chemical equation describes an acid-base neutralization reaction?
-LiOH(aq) + HNO3(aq) → LiNO3(aq) + H2O(l)
-2 SO2(g) + 2 H2O(l) + O2(g) → 2 H2SO4(aq)
-2 Al(s) + 3 H2SO4(aq) → Al2(SO4)3 (aq) + 3 H2(g)
-2 KBr(aq) + Cl2(g) → 2 KCl(aq) + Br2(l)
-CaBr2(aq) + H2SO4(aq) → CaSO4(s) + 2 HBr(g)
LiOH(aq) + HNO3(aq) → LiNO3(aq) + H2O(l)
If aqueous solutions of ammonium sulfide and copper(II) nitrate are mixed, which insoluble precipitate is formed?
CuS
