Honors Chemistry Chapter 9 Assessment

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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-


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