Honors Chemistry Chapter 9 Assessment
What is the expected charges on the ions of Group 1A elements?
+1
What is the expected charges on the ions of Group 3A elements?
+3
What is the expected charges on the ions of Group 7A elements?
-1
What is the expected charges on the ions of Group 6A elements?
-2
What is the expected charge of the cations in Cs?
1+
What is the expected charge of the cations in Ca?
2+
What is the expected charge of the cations in Sr?
2+
What is the expected charge of the cations in Al?
3+
What are the components of a binary molecular compound?
A combination of two nonmetal elements.
A bottle contains a mixture of ammonium chloride and barium sulfate. How could you separate these two compounds?
Add water to dissolve the NH4Cl, and then filter out the insoluble BaSO4
What is the formula for silver chloride
AgCl
Write the formula for aluminum hydroxide
Al(OH)3
What is the formula for aluminum carbide
Al4C3
Write the formula for boron trichloride
BCl3
What is the formula for barium hydroxide
Ba(OH)2
Name the ion for Ba2+
Barium
What is the name of the BaF2 compound
Barium Fluoride
What is the name of the Ba3(PO4)2 substance
Barium Phosphate
What is the name of the Be(NO3)2 compound
Beryllium Nitrate
What is the formula for strontium acetate
C4H6O4Sr
Name two binary molecular compounds
CBr4 and ClBr
Give the formula for acetic acid
CH3COOH
What is the formula for calcium hydrogen carbonate
Ca(HCO3)2
What is the formula for calcium bromide
CaBr2
What is the formula for calcium carbonate
CaCO3
Write the formula for antacid (calcium carbonate and magnesium hydroxide)
CaCO3 and Mg(OH)2
What is the name of the CaO substance
Calcium Oxide
What is the formula for dichlorine heptoxide
Cl2O7
What is the name of the CuC2H3O2 substance
Copper (I) Acetate
What is the formula for copper (II) nitrite
Cu(NO2)2
Write the formula for copper(II) hydroxide
Cu(OH)2
How do you determine the charge of a transition metal cation from the formula of an ionic compound containing that cation?
Determine the charge of the anion, then work the formula backward to find the charge of the transition metal cation needed to give a net charge of zero for the formula unit
What is the name of the Cl2O substance
Dichlorine monoxide
Write the formula for iron (II) hydroxide
Fe(OH)2
What is the formula for ferric sulfate
Fe2(SO4)3
Write the formula for pasta (ferrous sulfate)
FeO4S
How are formulas for binary molecular compounds written, given their names? How is the reverse performed, given their formulas?
First use the prefixes in the name to tell you the subscript of each element in the formula. Then, write the correct symbols for the two elements with the aporopriate subscripts
How are formulas written for ionic compounds with polyatomic ions, given their names? How is the reverse done?
First write the symbol (or formula) for the anion. Then, add subscripts as needed to balance the charges. Whenever more than one polyatomic ion is needed to balance the charges in an ionic compound, use parentheses to set off the polyatomic ion in the formula
How are chemical formulas written for binary ionic compounds, given their names? How is the reverse done?
First write the symbol of the cation and then the anion. Then add subscripts as needed to balance the charges; if the metallic element in a binary ionic compound has more than one common ionic charge, a Roman numeral must be included in the cation name
Give the formula for sulfuric acid
H2SO4
Write the formula for hydroselenic acid
H2Se
Write the formula for phosphoric acid
H3PO4
Name two compounds with polyatomic acids
HCN and H2SiO3
Name three compounds with polyatomic ions
HCN; NH4OH; H2SiO3; Na2HPO4 and KMnO4
Write the formula for nitrous acid
HNO2
What is the name of the N2H4 compound
Hydrazine
What is the ion in OH-
Hydroxide
What is the net charge of every ionic compound?
In every ionic compound, the total positive charge of the cations must always equal the total negative charge of the anions, so that the net charge of the complex is always zero.
What is the law of definite proportions
In samples of any chemical compound, the masses of the elements are always in the same proportions
Name the ion for I-
Iodine
What is the name of the I2 substance
Iodine
What is the formula for potassium sulfite
K2SO3
What is the formula for potassium permanganate
KMnO4
What is the formula for lithium hydride
LiH
What is the name of the LiOH compound
Lithium Hydroxide
What is the name of the LiCl04 substance
Lithium perchlorate
What is the name of the Mg(MnO4)2 compound
Magnesium Permanganate
Name the ion for Hg2+
Mercury (II)
What is the name of the HgF2 substance
Mercury (II) Fluoride
What is the formula for magnesium sulfide
MgS
Name two binary ionic compounds
MgS and Al2O3
Write the formula for dinitrogen tetrahydride
N2H4
Name one compound with polyatomic base
NH4OH
What is the formula for nitrogen dioxide
NO2
What is the formula for sodium silicate
Na2O3Si
What is the formula for sodium phosphite
Na3O3P
Sodium aluminum sulfate is an active ingredient in baking powder. The molecular formula for this ionic compound contains two sulfate ions. Write the complete molecular formula for sodium aluminum sulfate
NaAl(SO4)2·12H2O or Na2SO4·Al2(SO4)3·24H2O
What is the formula for sodium bromide
NaBr
Write the formula for toothpaste for sensitive teeth (sodium fluoride and potassium nitrate)
NaF and KNO3
What is the formula for sodium dihydrogen phosphate
NaH2PO4
What is wrong with the formula LiNe and what is the correct formula
Neon does not form compounds
Is every compound that contains hydrogen an acid?
No
Nitrous oxide, laughing gas, is used as an anesthetic in dentristy. The mass ratio of nitrogen to oxygen is 7:4. A 68-g sample of a compound composed of nitrogen and oxygen contains 42g of nitrogen. Is the sample nitrous oxide?
No, the ratio of nitrogen to oxygen is 42:26, which is not a 7:4 ratio
What is the formula for phosphorus pentabromide
PBr5
What is the name of the H3PO3 compound
Phosphorous acid
What is the name of the PI3 compound
Phosphorus triiodide
What is the name of the K2CO3 compound
Potassium Carbonate
You have two unlabeled bottles, each containing a white powder. One of the substances is calcium carbonate, and the other is potassium carbonate. How could you distinguish between these two compounds?
Potassium carbonate has a greater water solubility than CaCO3, so you could see which one dissolves in water more readily
What is the formula for trisilicon tetranitride
Si3N4
What is the name of the SiCl4 substance
Silicon Tetrachloride
Name the ion for Ag+
Silver
What is the formula for tin (IV) cyanide
Sn(CN)4
Two compounds contain only tin and chlorine. The ratio of the masses of chlorine combined with 1.00 g of tin in the two compounds is 2:1. If one compound has the formula SnCl2, what is the formula for the other compound?
SnCl4
Write the formula for strontium hydroxide
Sr(OH)2
What is the name of the SrSO4 substance
Strontium Sulfate
How would you distinguish between samples of copper (II) sulfate pentahydrate and iron (II) sulfate pentahydrate
The copper compound is blue; the iron compound is white
Write the formula for sunscreen (titanium (IV) oxide and zinc oxide)
TiO2 and ZnO
Calculate the volume of 16.6 g of sulfur
Volume - mass/density 16.6 g / 2.07 g/cm3 = 8.02 cm3
When must parentheses be used in a formula for a compound?
When more than one polyatomic ion is required, parenthesis are used to enclose the ion with the subscript going outside the parenthesis.
Describe the law of multiple proportions
Whenever the same two elements form more than one compound, the different masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers.
Where on the periodic table will you find the two elements in a binary molecular compound?
With the non-metals on the right hand side
What is the name of the ZnO compound
Zinc Oxide
What is the name of the BaS compound
barium sulfide
A compound of general formula QxRy contains no hydrogen, and Q and R are both elements. Neither Q nor R is a metal. Is QxRy an acid, a binary ionic compound, or a binary molecular compound?
binary molecular compound
What is the name of the Ca(OH)2 compound
calcium hydroxide
Write the name for CCl4
carbon tetrachloride
Write the name for Co(OH)2
cobalt (II) hydroxide
How can you distinguish among the Group 7A elements?
color, density, melting point and boiling point
What prefix indicates "2 atoms" in the formula of a binary molecular compound?
di-
Write the name for P2O5
diphosphorus pentoxide
What prefix indicates "6 atoms" in the formula of a binary molecular compound?
hexa-
Give the name for HCl
hydrochloric acid
What is the name of the Fe(C2H302) compound
iron (III) acetate
Write the name for Pb(OH)2
lead (II) Hydroxide
What is the ion in Pb4+
lead (IV)
Calculate the mass of 47.0 cm3 of mercury
mass = density x volume mass = 47.0 cm3 x 13.59 g/cm3 = 639 g Hg
What is the name of the Hg2Br2 compound
mercury (I) bromide
What prefix indicates "1 atoms" in the formula of a binary molecular compound?
mono-
Give the name for HNO3
nitric acid
What is the ion in O2-
oxide
What prefix indicates "5 atoms" in the formula of a binary molecular compound?
penta-
What is the name of the HClO4 compound
perchloric acid
What is the name of the K2Cro4 compound
potassium chromate
What is the name of the KHSO4 compound
potassium hydrogen sulfate
What is the name of the NaClO3 compound
sodium chlorate
What is the ion in SO4 2-
sulfate
What prefix indicates "4 atoms" in the formula of a binary molecular compound?
tetra-
What is wrong with the formula CsCl2 and what is the correct formula
the charges do not balance; CsCl
What is wrong with the formula ZnO2 and what is the correct formula
the charges do not balance; ZnO
What is wrong with the formula Ba2S2 and what is the correct formula
the subscripts are not the lowest whole-number; BaS
What is the name of the SnO2 compound
tin (IV) oxide
What prefix indicates "3 atoms" in the formula of a binary molecular compound?
tri-
