ionic compounds
determine the charges of aluminum , magnesium, potassium, and sodium
3a.+3
2a.+2
1a.+1
how are formulas written with compounds with polyatomic atoms
write the cation in the first name and thne anion in the second name. find the ion charge and then cancel out
give the molar mass of a covalent compound
molar mass of a covalent compound is measured by molecular mass
write carbonate dioxide into an equation
C + 02 = C02
2Na + Cl2 → 2NaCl.
2H02 → 2H20 + 02
CH4 + 202 → CO2 + 2H2O
2KI(aq)+Pb(NO3)2(aq)→2KNO3(aq)+PbI2(s)
2K + 2H2O → 2KOH + H.
1.Synthesis
2.decomposition
3.combustion
4.double replacement
5. single replacement
How are ions formed?
Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions
how do you find the molar mass of an ionic compound
sum all the atomic mass of the constituent atoms.
if you are given an ionic formula, how do you know the moles and atoms present in the formula
atoms are going to be present in the formula and you just have to divide atoms by avogrados number.
name the seven diatomic elements
H2, O2, F2, Br2, I2, N2, and Cl2
how does synthesis occur?
A synthesis reaction occurs when two or more reactants combine to form a single product.
name proprties of ionic compunds
they form crystals, high melting points and high boiling points, hard and brittle, etc.
How are ionic and covalent bonds different physically?
covalent bonds cane either be a solid,liquid, or a gas at room temperature.
ionic bonds are only solids at room temperature
calculate the shape of a carbon molecule using VSEPR
H - C - H and H - C - Cl bond angles of 109.5° and a tetrahedral shape
Why is it important to balance chemical reactions using the law conservation of mass
is very important to the study and production of chemical reactions. If scientists know the quantities and identities of reactants for a particular reaction, they can predict the amounts of products that will be made.
how do you predict a single and double replacement
Single- A single-replacement reaction replaces one element for another in a compound.
Double- A double-replacement reaction exchanges the cations (or the anions) of two ionic compounds.
how do you write a binary compound formula
you have to know the name of the nianry compound and then Start by writing the metal ion with its charge, followed by the nonmetal ion with its charge.
how is the ocet rule used when valence electrons are shared to make covalent bond
Carbon needs 4 more valence electrons. Since each Oxygen atom has 3 lone pairs of electrons, they can each share 1 pair of electrons with Carbon; as a result, filling Carbon's outer valence shell
whats one mistake when balancing equations?
mistaking diatomic molecules as being already balanced in a chemical equation.
how would you write a formula for compounds with a metal with more than one charge?
combine both cation and anion
how would you write a chemical formula for a binary molecular compound
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 appropriate subscripts.
how would you write a ratio in from the coefficients in chemically balanced equations
The coefficients of the balanced equation are the ratios of moles of the reactants and products that are required for the reaction to proceed as written.