Empirical Formulas
Molecular Formulas
Ions
Compounds
Reactions
100
Define an empirical formula.
What is the lowest integer ratio of elements in a compound.
100
What is a molecular formula?
What is the elements present in a molecule (not reduced to lowest ratio or integers).
100
What is the difference between an anion and cation?
What is anion is negative, cation is positive.
100
When a compound forms from ions, what must it be overall?
What is neutral.
100
What is a physical change, give an example?
What is a change in a substance that does not result in a change chemically. (i.e. change in state, etc). Water > Ice, etc.
200
What is the empirical formula of C3H6O3?
What is CH2O.
200
What is the difference between Co, CO, and CO2?
What is one is an element, one is a poisonous gas, and the last a harmless gas.
200
Why does a polyatomic ion possess a charge?
What is the number of protons in the compound does not equal the number of electrons overall.
200
Where can polyatomic ions be found in the reference tables, and what information is there?
What is table E, name, formula, and charge can be found.
200
What is a chemical change, give an example?
What is a change in substances (chemical reaction) that results in the formation of a new substance. Iron rusting, etc.
300
If the GCF is 2, and a substance's empirical formula is C3H4O3, what is it's molecular formula?
What is C6H8O6.
300
What information do molecular formulas tell us about a substance?
What is qualitative and quantitative information. (Information about the molecule).
300
What compound is formed from the sulfate ion and sodium? (chemical formula required)
What is Na2SO4.
300
What is the name of (NH4)2SO4?
What is ammonium sulfate?
300
Write the chemical equation for the melting of ice.
What is H2O (s) ---> H2O (l).
400
Write the empirical formula for the compound: C18H45O63
What is C2H5O7.
400
What molecule (or compound) forms from the reaction of lithium metal and chlorine gas?
What is LiCl, or lithium chloride.
400
What charge is associated with the acetate ion, and how many forms does it have?
What is negative one, and two written forms.
400
**(DAILY DOUBLE!!!)** What are the three rules for naming compounds formed from ions?
What is the cation name stays the same, the anion name ends in "ide" if elemental, and polyatomic anions and cations stay the same.
400
What is the chemical equation for the reaction of ammonium with chlorine? (need all components correct)
What is NH4+ + Cl- ------> NH4Cl.
500
Why are empirical formulas important? (what do they tell us)
What is they let us know in what ratio certain elements are present in a compound.
500
**(DAILY DOUBLE!!!)** What are the seven diatomic elements, and one of the acronyms to remember them?
What is H, O, N, F, Cl, Br, and I. Acronyms: Hon, go to the store and buy me some fluorine, chlorine, bromine, and iodine. (Or other)
500
Name and write the compound that forms from Mg2+ and PO4 3-.
What is Mg3(PO4)2, magnesium phosphate.
500
Create two compounds using polyatomic ions and name them both.
What is (points given as per instructor approval).
500
A hydrate FeSO4*6H2O is formed, what is it's molecular mass?
What is 260.00 amu.
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