Write obervation and the complete molecular equation for each reaction. Identify each reaction as redox or non-redox. A1: Mg will burn with a bright color and turn into ash. redox or non-redox: Observation: Equation: A2: Dissolving collected ash from Al in water and then adding phenolpthalein to the solution result in a pink color solution. redox or non-redox: Observation: Equation:

Fundamentals Of Analytical Chemistry
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Author:Skoog
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Chapter17: Complexation And Precipitation Reactions And Titrations
Section: Chapter Questions
Problem 17.24QAP
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Write obervation and the complete molecular equation for each reaction. Identify each reaction as redox or non-redox. A1: Mg will burn with a bright color and turn into ash. redox or non-redox: Observation: Equation: A2: Dissolving collected ash from Al in water and then adding phenolpthalein to the solution result in a pink color solution. redox or non-redox: Observation: Equation:
|ミ|ミ
>>>>E
|彡1彡
|彡
SOLUBILITY TABLE
CrO
CH,COO
Br
CO3-
OH
NO,
O-
PO
SO
AP
W
A
W
W
A
a
NH,*
W
W
W
W
W
W
W
W
W
--
Ba
W
W
W
W
W
W.
a
d
Ca2+
W
W
Cr
W
W
W
W
d.
--
a
Co+
W
W
W
A
A
W
W
A
A
W
A
Cu
W
W
W
A
a
W
A
W
H*
W
W
W
W
W
W
W
Fe
W
W
W
A
W
A
Fe+
W
W
W
A
W
A
d
A
W
d.
Mg
A
W
W
W
W
Hg"
A
W
A
A
W
A
a
W.
A
W
A
I
Hg*
W
W
W
Ni
W
W
W
W
A
W
W
W
W
W
W
W
W
K
W
W
W
A
Ag
a
--
W
a
10
W
W
W
W
d.
W
W
Na*
W
W
W
W
A
W
d.
A
A
W
A
Sn2+
D
W
W
A
A
A
Sn+
W
W
W
W
W
W
A
W
A
W
A
Zn
W
W
Key to abbreviations:
w= only slightly soluble in water, but soluble in acids
W= soluble in water
A= insoluble in water, but soluble in acids
I= insoluble in both water and acids
d= decomposes in water
a= insoluble in water, and only slightly soluble in acids
Transcribed Image Text:|ミ|ミ >>>>E |彡1彡 |彡 SOLUBILITY TABLE CrO CH,COO Br CO3- OH NO, O- PO SO AP W A W W A a NH,* W W W W W W W W W -- Ba W W W W W W. a d Ca2+ W W Cr W W W W d. -- a Co+ W W W A A W W A A W A Cu W W W A a W A W H* W W W W W W W Fe W W W A W A Fe+ W W W A W A d A W d. Mg A W W W W Hg" A W A A W A a W. A W A I Hg* W W W Ni W W W W A W W W W W W W W K W W W A Ag a -- W a 10 W W W W d. W W Na* W W W W A W d. A A W A Sn2+ D W W A A A Sn+ W W W W W W A W A W A Zn W W Key to abbreviations: w= only slightly soluble in water, but soluble in acids W= soluble in water A= insoluble in water, but soluble in acids I= insoluble in both water and acids d= decomposes in water a= insoluble in water, and only slightly soluble in acids
5.
Acids and caustic chemicals are stored in the hood. Please do not take these chemicals from the hood.
PART I - METATHETICAL REACTIONS
Metathetical reactions are sometimes called double-replacement reactions. In these reactions two compounds exchange ions with each
other. Metathetical reactions are usually carried out in aqueous
solution. The general formula for this type of reaction is
AC+BD→AD+BC
A.
PRECIPITATION REACTIONS
In this type of metathetical reaction, a precipitate is formed. The precipitate is indicated by an arrow pointing down or the
physical state indicator (s). The formation of a precipitate may be predicted by using solubility rules or a solubility chart.
Examples:
AgNO,(aq) + NaCl(aq) → AgCl(s) \ + NaN0;(aq)
In these reactions, all of the soluble compounds are considered dissociated into their ions. The ions, which are not involved in the
precipitate, are considered "spectator ions".
PROCEDURES: Perform each
Cd( NO; ), (aq) + (NH,),S(aq) → 2 NH, NO;(aq) + CdS(s)+
of the following reactions.
Write your observations in your
notebook and write the equation for each reaction. Indicate the precipitate.
1.
To a dropperful of 0.1 M calcium nitrate in a test tube, add a dropperful of 0.1 M sodium carbonate.
2.
To a dropperful of 0.1 M magnesium sulfate in a test tube, add a dropperful of 0.1 M sodium hydroxide.
3.
To a dropperful of 0.1 M sodium nitrate in a test tube, add a dropperful of 0.1 M potassium chloride.
В.
ACID-BASE REACTIONS
Transcribed Image Text:5. Acids and caustic chemicals are stored in the hood. Please do not take these chemicals from the hood. PART I - METATHETICAL REACTIONS Metathetical reactions are sometimes called double-replacement reactions. In these reactions two compounds exchange ions with each other. Metathetical reactions are usually carried out in aqueous solution. The general formula for this type of reaction is AC+BD→AD+BC A. PRECIPITATION REACTIONS In this type of metathetical reaction, a precipitate is formed. The precipitate is indicated by an arrow pointing down or the physical state indicator (s). The formation of a precipitate may be predicted by using solubility rules or a solubility chart. Examples: AgNO,(aq) + NaCl(aq) → AgCl(s) \ + NaN0;(aq) In these reactions, all of the soluble compounds are considered dissociated into their ions. The ions, which are not involved in the precipitate, are considered "spectator ions". PROCEDURES: Perform each Cd( NO; ), (aq) + (NH,),S(aq) → 2 NH, NO;(aq) + CdS(s)+ of the following reactions. Write your observations in your notebook and write the equation for each reaction. Indicate the precipitate. 1. To a dropperful of 0.1 M calcium nitrate in a test tube, add a dropperful of 0.1 M sodium carbonate. 2. To a dropperful of 0.1 M magnesium sulfate in a test tube, add a dropperful of 0.1 M sodium hydroxide. 3. To a dropperful of 0.1 M sodium nitrate in a test tube, add a dropperful of 0.1 M potassium chloride. В. ACID-BASE REACTIONS
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