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Empirical Formulas
Miscellaneous
100
Name NaCl.
sodium chloride
100
Give the molecular formula for hydrogen peroxide.
H2O2
100
What is the name of the compound, SO3?
Sulfur trioxide
100
What is difference between molecular and empirical formula?
molecular is not reduced form empirical is the reduced form
100
Draw the Lewis Dot Structure for water.
Show on board.
200
What is the name of HCl. Give two names.
hydrogen chloride or hydrochloric acid
200
What is the molecular formula for butane?
C4H10
200
How would you name CH3OH ?
methanol
200
What is the empirical formula for hydrogen peroxide?
HO- empirical H2O2- molecular
200
Name two differences between Ionic and Covalent Bonding.
Ionic- between cation and anion (metal and nonmetal) and is a transfer of electrons Covalent- between two nonmentals and is a sharing of electrons
300
Write the formula of ammonium and ammonia.
ammonium- NH4+ ammonia- NH3
300
What is the formula of the ion sulfite.
SO3^2-
300
Write the formula of the ions phosphate and phosphite.
phosphate- PO4^3- phosphite- PO3^3-
300
A 100 gram sample of compound of sodium contains 36.5 grams of sodium, 25.4 grams of sulfur, and 38.1 grams of oxygen. Does the empirical formula for the compound lead you to believe it is sodium sulfite or sodium sulfate?
Na2SO3, sodium sulfite
300
What is the Law of Definite Proportions?
a chemical compound always contains exactly the same proportion of elements by mass
400
What is the chemical formula of dichromate?
Cr2O7^2-
400
Write the chemical formula of iron(III) hydroxide.
Fe(OH)3- chemical formula
400
Write the chemical formula of copper (II) nitrate.
Cu(NO3)2
400
A 35.0 mg sample contains only C, H & N. Decomposition produced 33.5 g carbon dioxide and 41.1 g of water. What is the empirical formula?
C1H6N2 WHATEVER TEAM PICK THIS GETS TO CHOOSE THE NEXT SQUARE FOR THE OPPOSING TEAM.
400
Rank the following in increasing lattice energy: MgO, NaCl, and KCl
KCl < NaCl < MgO Lattice Energy- the energy required to separate one mole of a solid ionic compound into its gaseous form. Increase in charge= Increase in lattice energy Increase in size= decrease in lattice energy Charge affects Lattice energy more than size
500
How would you draw methanoic acid?
HCOOH
500
Draw and name HCN.
hydrogen cyanide or hydrocyanic acid. HCN with a triple bond between C and N and a lone pair on N
500
What is the chemical formula for lithium oxalate?
Li2C2O4
500
Find the molecular formula if a compound is composed of 49.31% C, 43.84% O and the rest hydrogen. Its molar mass is 146 g/mol.
C6O4H10 WHATEVER TEAM PICK THIS GETS TO CHOOSE THE NEXT SQUARE FOR THE OPPOSING TEAM.
500
Why are ice and water not allotropes?
Allotropes- to exist in different forms of ELEMENTS not COMPOUNDS due to atoms being bounded together in different manners. Example: Carbon can exist as diamond or graphite.