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Chemistry Worksheet: Precipitation, Acids and Bases, and Molarity - Chapter 4 - Prof. Zeld, Assignments of Chemistry

This worksheet covers various topics including oxidation numbers, precipitation reactions, acid-base reactions, and molarity calculations. Students are required to identify oxidation states, write net ionic equations, and calculate molarities. Reactions between different compounds such as cu, agno3, mg, ca(oh)2, agcl, co, and koh are included.

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Pre 2010

Uploaded on 08/19/2009

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CH 221—Ziegler Chapter 4 WORKSHEET
Precipitation, Acids and Bases, and Molarity
1. Oxidation numbers Give the oxidation state of each element in the following compounds
Zn
Pb(NO3)2
Zn(NO3)2
HI
HIO4
H2SO4
CO
CO2
CO3-2
NH3
H2O
H2O2
NO3-
O2
N2
CH4
2. In the following reactions, identifiy: the element which is oxidized, the element reduced, the
oxidizing agent, and the reducing agent.
Cu + 2AgNO3 Æ 2Ag + Cu(NO3)2
Mg + Ca(OH)2 Æ Ca + Mg(OH)2
2AgCl + Co Æ CoCl2 + 2Ag
Cu + Zn+2 Æ Zn + Cu+2
pf3
pf4

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CH 221—Ziegler Chapter 4 WORKSHEET Precipitation, Acids and Bases, and Molarity

  1. Oxidation numbers Give the oxidation state of each element in the following compounds

Zn

Pb(NO 3 ) 2

Zn(NO 3 ) 2

HI

HIO 4

H 2 SO 4

CO

CO 2

CO 3 -

NH 3

H 2 O

H 2 O 2

NO 3 -

O 2

N 2

CH 4

  1. In the following reactions, identifiy: the element which is oxidized, the element reduced, the oxidizing agent, and the reducing agent.

Cu + 2AgNO 3 Æ 2Ag + Cu(NO 3 ) 2

Mg + Ca(OH) 2 Æ Ca + Mg(OH) 2

2AgCl + Co Æ CoCl 2 + 2Ag

Cu + Zn+2^ Æ Zn + Cu+

  1. Write net ionic equations for any precipitation reaction reactions that occur on mixing aqueous solutions of the following substances.

a. KCl and AgNO 3

b. NaOH and MgCl 2

c. Fe 2 (SO 4 ) 3 and BaCl 2

d. KCl and Mg(NO 3 ) 2

  1. Write net ionic equations for each of the following acid/base reactions. a. HF + Ca(OH) 2 Æ

b. H 2 SO 4 + Mg(OH) 2 Æ

c. HI + Ba(OH) 2 Æ

d. KOH + HC 2 H 3 O 2 Æ

e. HCl + Fe(OH) 3 Æ

  1. A solution is prepared by taking 25.00 mL of a 0.300 M Ca(OH) 2 solution, and adding enough water to a total volume of 0.500 L of solution.

a. What is the molarity of Ca(OH) 2 in this solution?

b. Of Ca+2^ ion?

c. Of OH-^ ion?

  1. Give the net ionic equation describing what happens when 25.00 ml of the solution in 0.300 M Ca(OH) 2 is mixed with 25.00 ml of the solution in 0.100 M MgCl 2.

a. What is the ionic equation for the reaction between these two solutions?

b. How many moles of the precipitate is formed?

c. What is the molarity of each spectator ion in the resulting solution?