Che 140 Learn Smart Ch. 3
What is the formula for the compound containing barium and fluoride ions?
BaF₂
Which of the compounds below are molecular compounds?
CO₂ HC₂H₃O₂ CH₄
What is the chemical formula for the compound carbon tetraiodide?
Cl4
Choose the monoatomic anion from the lest below
Cl⁻ O2⁻
What is the formula for the compound cobalt(II) hydroxide?
Co(OH)₂
Which of the following are general characteristics of molecular compounds?
Contain only nonmetals Create nonelectrolytic solutions
Ionic solids have very distinct properties due to their ordered crystal lattice. They have very ________melting points and the solids are very ___________
high hard
Dry ice (solid Co2) is a(n)___________ compound. It is a relatively ___________solid.
molecular soft
Nonelectrolyte solutions contain _________ compounds. These compounds ____________ dissociate into ions when dissolved in water.
molecular will not
The name of the acid with the formula HNO₂
nitrous acid
Select all of the metals below that do not form cations of more than one charge
Sr Li
What occurs when a molecular solid dissolves in water?
The solid breaks into molecules that interact with water
Which of the following are physical properties of molecular compounds?
They can be liquids at room temperature They can be solids at room temperature They can be gases at room temperature
What is the total number of ions (number of cation plus number of anions) in the compound Mg(OH)₂?
Three ions
In the solid form, the cesium and chloride ions that make up cesium chloride (CsCl) exists as
a Cs+ and Cl- lattice
Polyatomic ions are ions that contain two or more
atoms
What is the name of the K⁺ cation?
Potassium ion
A molecular compound could contain which of the following atoms?
N H C Cl
Which of the following formulas correctly gives the formula of the ionic compound formed between ammonium and fluorides ions?
NH4F
Which of the following compounds contain polyatomic ions?
NH4F Al(NO3)3 BaCO3
Match the compound to its electrolytic properties
NaCl - strong electrolyte CH₃CH₂OH - nonelectrolyte
Which of the following compounds are bases when dissolved in water?
NaOH NH₃ Ca(OH)₂
Complete the following sentences using the terms: weak, strong, or non. A bulb connected to s battery through a solution of ethanol (CH₃CH₂OH) does not light up; ethanol is a ________ electrolyte. A bulb connected through a solution of calcium chloride (CaCl₂) lights up brightly; calcium chloride is a ____________ electrolyte.
non strong
A base is a substance that
reacts with acid to produce water
The written name for Na3N is
sodium nitride
The compound MgCl₂ will be a __________ at room temperature because it is a(n) __________ compound.
solid ionic
What is the name of the compound with the formula Sr(OH)2?
strontium hydroxide
True or False: ionic compounds contain a combination of oppositely charged cations anions in a specific ratio to produce a compound with a given whole-number charge?
FALSE
Which of the following compounds are acids?
HCN HF
What is the name of the acid containing only hydrogen and bromine?
Hydrobromic acid
What is the name of the compound Fe₂(CO₃)₃?
Iron (III) carbonate
Which of the following represent correctly written formula units?
KF, Ba(NO2)2
A substance that ionizes to produce H⁺ ions when dissolved in water is called a(n)
acid
The symbol for the iodide ion has the folloing characteristics
charge of 1- capital letter I
What is the name of the compound with the written formula CuF2?
copper(II) fluoride
What is the name of the compound with the formula N2O5
dinitrogen pentoxide
When an ionic solid dissolves in water, the ions that make up the solid___________and the ions interact with water molecules.
dissociate
A substance that releases ions in solution when dissolved in water is called a(n)_______. This solution ________conduct electricity.
electrolyte, will
The densities of ionic compounds are __________ than the densities of molecular compounds
higher
MgBr2 is a(n) ______ solid. It will therefore be a relatively ______solid
ionic hard
Ionic solids contain densely packed
ions of alternating positive and negative charge.
Which of the metals below can exhibit multiple charges?
iron cobalt