Agenda Jan 19th, 2017
Polyatomic Ions - Pogil, to correct
Naming Acids - Special group of compounds
10 Polyatomic Ions Quiz - Preparation Sheet
Polyatomic Ions
Starting at Model 2 - Common Polyatomic Ions
11.
What is the only polyatomic ion that is a
cation?
11.
What is the only polyatomic ion that is a
cation?
Ammonium NH4
+
12.
How are bicarbonate and carbonate
12related? HCO3
CO3
12.
How are bicarbonate and carbonate
12related? HCO3
CO3
Bicarbonate has the same basic formula
as carbonate, but with an added
hydrogen ion (H+). The charge on the
ion has decreased from -2 to -1.
13.
Predict the chemical formula and charge
for the bisulfate ion
Bisulfate
sulfate
2-
?
SO4
HCO31-
CO32-
Bicarbonate
carbonate
13.
Predict the chemical formula and charge
for the bisulfate ion
Bisulfate
HSO4
1-
sulfate
SO4
2-
14.
How are chromate and dichromate
related?
14.
How are chromate and dichromate
related?
Both ions have chromium and oxygen
atoms, but dichromate has two chromium
atoms and more oxygen atoms that
chromate. Both have -2 charge.
15.
Bromine forms polyatomic ions with
structures similar to those of chlorine.
Using the chlorine family of
polyatomic ions as a model, predict
name of BrO4 ion.
Which ions in the table are they?
15.
Bromine forms polyatomic ions with
structures similar to those of chlorine.
Using the chlorine family of polyatomic
ions as a model, predict name of BrO4ion. Perchlorate, chlorate, chlorite and
hypochlorite - which is similar to one
above?
15.
Bromine forms polyatomic ions with
structures similar to those of chlorine.
Using the chlorine family of polyatomic
ions as a model, predict name of BrO4ion.
perchlorate ClO4-
vs.
BrO4-
15.
Bromine forms polyatomic ions with
structures similar to those of chlorine.
Using the chlorine family of polyatomic
ions as a model, predict name of BrO4ion.
perchlorate ClO4-
perbromate BrO4-
16.
Identify the polyatomic ion in each of
these ionic compounds. Write out the
name and formula of the ions, including
charges.
a) CaCO3
16.
Identify the polyatomic ion in each of
these ionic compounds. Write out the
name and formula of the ions, including
charges.
a) CaCO3 carbonate CO32-
16.
Identify the polyatomic ion in each of
these ionic compounds. Write out the
name and formula of the ions, including
charges.
b)
Mg(OH)2
16.
Identify the polyatomic ion in each of
these ionic compounds. Write out the
name and formula of the ions, including
charges.
b)
Mg(OH)2 hydroxide OH1-
16.
Identify the polyatomic ion in each of
these ionic compounds. Write out the
name and formula of the ions, including
charges.
b)
NH4Cl
16.
Identify the polyatomic ion in each of
these ionic compounds. Write out the
name and formula of the ions, including
charges.
b)
NH4Cl
ammonium NH41+
Model 3. Ternary Ionic Compounds
17. How are ternary ionic compounds in
Model 3 different from binary ionic
compounds that you’ve seen previously?
Model 3. Ternary Ionic Compounds
17. How are ternary ionic compounds in
Model 3 different from binary ionic
compounds that you’ve seen previously?
Ternary ionic compounds have three or
more elements involved, binary
compounds only two.
Model 3. Ternary Ionic Compounds
18. Consider the compound iron(III)
hydroxide in Model 3. Fe(OH)3
a) How many hydroxide ions (OH-) are
3+
combined with an iron(III) ion (Fe )?
Model 3. Ternary Ionic Compounds
18. Consider the compound iron(III)
hydroxide in Model 3. Fe(OH)3
a) How many hydroxide ions (OH-) are
3+
combined with an iron(III) ion (Fe )?
Three hydroxide ions
Model 3. Ternary Ionic Compounds
18. Consider the compound iron(III)
hydroxide in Model 3. Fe(OH)3
a)
Remember the roman
numerals
us the
How
manytellhydroxide
ions (OH-) are
charge on the metal cation
3+
combined
withthean
ion (Fe )?
Iron(III) means
ion iron(III)
in
the compound is Fe3+
Three hydroxide ions
Model 3. Ternary Ionic Compounds
b) Is your answer to part a the only
combination of iron(III) ions and
hydroxide ions (OH-) that should exist in
nature?
Model 3. Ternary Ionic Compounds
b) Is your answer to part a the only
combination of iron(III) ions and
hydroxide ions (OH-) that should exist in
nature?
Yes, there is only one ratio that will result
in a neutral compound.
Model 3. Ternary Ionic Compounds
19. Consider the compound barium
nitrate in Model 3.
a) What does the subscripted “2” inside
the parentheses of the chemical
formula tell you about the compound?
Ba(NO2)2
Model 3. Ternary Ionic Compounds
a) What does the subscripted “2” inside
the parentheses of the chemical
formula tell you about the compound?
Ba(NO2)2
Two oxygen atoms are bonded to a
nitrogen atom in the polyatomic nitrite ion.
Model 3. Ternary Ionic Compounds
b) What does the subscripted “2” outside
the parentheses of the chemical formula
tell you about the compound?
Ba(NO2)2
Model 3. Ternary Ionic Compounds
b) What does the subscripted “2” outside
the parentheses of the chemical formula
tell you about the compound?
Ba(NO2)2A ratio of two polyatomic nitrite
ions to one barium ion are needed to
make a neutral compound.
Model 3. Ternary Ionic Compounds
20. How many atoms of each element are
in one formula unit of ammonium
phosphate?
(NH4)3PO4
Model 3. Ternary Ionic Compounds
20. How many atoms of each element are
in one formula unit of ammonium
phosphate?
(NH4)3PO4
3Nitrogen
3x4= 12Hydrgen
1Phosphorus
4Oxygen
Model 3. Ternary Ionic Compounds
21. A student writes the chemical formula
for the ionic compound calcium hydroxide
as CaOH2
(incorrectly)
2+
a) Calcium ion is Ca Hydroxide ion is OH
b) Why is the student’s formula wrong?
-
Model 3. Ternary Ionic Compounds
21. A student writes the chemical formula
for the ionic compound calcium hydroxide
as CaOH2
Corrected = Ca(OH)2
2+
a) Calcium ion is Ca Hydroxide ion is OH
b) We need to show a ratio of 1:2 positive
ions to negative ions. Need to use
parentheses around the hydroxide ion.
-
22. Rule for appropriate use of parentheses in
ternary ionic compounds?
22. Rule for appropriate use of parentheses in
ternary ionic compounds?
Parentheses are used around any
polyatomic ion used more than once in a
formula unit.
22. Reasons the rest of the statements are not
correct.
Parentheses are used around any ion
used more than once in a formula unit.
False - see Al2(CO3)3
Monatomic ions do not have parentheses
around them.
22. Reasons the rest of the statements are not
correct.
Parentheses are used around any
polyatomic ion.
False - see KNO3
Parentheses are not used if the
polyatomic ion is being used only once.
22. Reasons the rest of the statements are not
correct.
Parentheses are only used around
polyatomic anions used more than once
in a formula. False - see (NH4)3PO4
Parentheses are also used if a polyatomic
cation is used more than once.
23. Write chemical formulas for the following ternary
ionic compounds. Be ready to explain how to put the
formulas together.
a)
b)
c)
d)
e)
f)
Calcium sulfate
Copper(II) nitrate
Lithium phosphate
Potassium permanganate
Aluminum sulfite
Magnesium bicarbonate
23. Write chemical formulas for the following ternary
ionic compounds. Be ready to explain how to put the
formulas together.
a)
b)
c)
d)
e)
f)
Calcium sulfate
CaSO4
Copper(II) nitrate
Cu(NO3)2
Lithium phosphate
Li3PO4
Potassium permanganate
KMnO4
Aluminum sulfite
Al2(SO3)3
Magnesium bicarbonate Mg(HCO3)2
24. Name the following ternary ionic compounds.
a)
b)
c)
d)
e)
f)
BaSO4
NH4NO3
K2Cr2O7
Fe(NO3)3
Mg(CH3COO)2
Al2(CO3)3
24. Name the following ternary ionic compounds.
a)
b)
c)
d)
e)
f)
BaSO4
barium sulfate
NH4NO3
ammonium nitrate
K2Cr2O7
potassium dichromate
Fe(NO3)3
iron(III) nitrate
Mg(CH3COO)2
Magnesium acetate
Al2(CO3)3
aluminum carbonate
NAMING ACIDS - Unique group of chemicals
2 sided worksheet (Pogil)
Naming Ionic Compounds
Single sided worksheet, Study Guide for Content Mastery, Chemistry Matter and
Change, Chapter 8
Both to be turned in at the end of the period. Stay in seats.
10 Polyatomic Ions to Memorize
Chromate CrO42-
dichromate Cr2O72-
carbonate CO32-
sulfate SO42-
nitrate NO3-
phosphate PO43-
cyanide CN-
ammonium NH4+
hydroxide OHpermanganate MnO4-
5 Acids to Memorize (write on back of
Common Ions sheet)
Hydrochloric acid HCl(aq)
Nitric acid HNO3(aq)
Sulfuric acid H2SO4(aq)
Carbonic acid H2CO3(aq)
Phosphoric acid H3PO4(aq)
Homework
1) Complete Naming Acids and Naming Ionic compounds
sheet if necessary.
2) Prepare for 10 Polyatomic ions + 5 Common Acids quiz
Quiz on Monday.
Ideas for studying:
3) a) Make flashcards or a quizlet
b) 8 Common polyatomic ions quiz
c) Many polyatomic ions quiz - challenge