7: Ions & Ionic Compounds
What are the outermost electrons called?
valence electrons
What kind of formula provides information about the number and types of atoms in a molecule?
molecular formula
What is used to indicate the charge of a transition metal ion when naming an ionic compound?
(23/31) x 100 = 74.2%
Predict the products: SnO -->
Balance the equation
loses two electrons
The side-by-side overlap of p orbitals form which type of bonds?
pi bonds
Write the formula for lead(II) sulfide
PbS
Find the percent titanium in TiO2.
47.90 + 32 = 79.9 g
(47.9/79.9) x 100 = 59.9% Ti
Does the following reaction take place? If so, predict the products and balance the equation.
Cu + NaCl -->
No. Cu is below Na on the activity series.
Write the electron configuration of the sulfide ion.
1s2 2s2 2p6 3s2 3p6
When atoms bond, molecules adjust so that which particles are spread out?
valence electrons
Write the formula for lithium carbonate.
Li2CO3
When finding an empirical formula, if the ratio of the elements is 1: 1.33: 2, what should be done to find the simplest ratio?
Multiply all number of moles by 3.
Predict the products and balance the equation.
C5H12 + O2 -->
C5H12 + 8 O2 --> 5CO2 + 6 H2O
With what types of elements do most ions share their electron configuration?
noble gases
How many valence electrons does an atom of phosphorus have in a molecule of PCl5?
10
Molecular compounds contain what types of elements?
nonmetals only
If the empirical formula mass is 25g/mole and the molar mass of the compound is 50 g/mole, what multiplier is used to find the molecular formula?
50/25 = 2
Identify the type of reaction and predict the products.
Ca(OH)2 + H2CO3 -->
Double replacement
--> CaCO3 + 2H2O
What types of particles make up ionic compounds?
cations and anions
What type of bond (single, double, or triple) forms between two halogen atoms?
single
What type of compound is NaOH?
base or ionic compound
If the empirical formula is CH2O and the molar mass is 120, what is the molecular formula of the compound?
C4H8O4
Does the reaction occur? If so, predict the products.
Zn + SnCl2 -->
Yes.
Zn + SnCl2 --> Sn + ZnCl2
What is the overall charge of an ionic compound?
neutral or zero
Which type of bond is the weakest?
pi bond
Name CoBr2.
Cobalt(II) bromide
What is the empirical formula of C6H14?
C3H7
When looking at an equation, how can you tell if the reaction is combustion?
oxygen is a reactant
Which subatomic particle is free to move and gives metals their properties?
electrons
In which type of bond are the electrons being shared unequally?
polar covalent bond
Name N2O4.
dinitrogen tetroxide
If a compound has the empirical formula C2H5 and a molar mass equal to 58 g/mole, what is the formula of the compound?
C4H10
Predict the products and balance the equation.
Mg + O2 -->
2 Mg + O2 --> 2 MgO