Intermolecular Forces
What is the strongest type of intermolecular force?
Hydrogen bonding
What are the products of a combustion reaction?
carbon dioxide and water
Based on the phase change graph, which line represents where sublimation occurs?
A
Find the molar mass of this compound:
CaF2
78 g/mol
What is the name of this ion:
PO4-3
Phosphate
Something with strong intermolecular forces will have a __________ boiling point
(high or low)
High
What type of reaction is this?
2HCl + Mg -> H2 + MgCl2
Single Replacement
Based on the solubility curve, which solutes are the exceptions to the general rule?
NaCl and Yb2(SO4)3
How many grams of H2O are there in 2 moles of H2O?
36 g
Which of these compounds is NOT ionic?
NaBr, Mg(OH)2, CO2, CaCO3
CO2 because it is composed of only nonmetal elements
After analyzing 2 unknown compounds, Compound 1 is found to have a melting point of -200 degrees C, while Compound 2 is found to have a melting point of -17 degrees C. Which compound would experience stronger intermolecular forces?
Compound 2 because it has a higher melting point
What coefficient(s) can be added to balance this equation:
Mg + O2 -> MgO
2Mg + O2 -> 2MgO
A container of gas under pressure is compressed to half of its original volume. Is the pressure greater or less than before?
Pressure is greater
A sample contain 6% hydrogen and 94% oxygen. What is the empirical formula of this compound?
HO
What are the spectator ions in this complete ionic equation:
Ca2+ + 2F- + 2K+ + CO32- -> CaCO3 + 2K+ + 2F-
2K+ and 2F-
Which intermolecular force causes surface tension in water?
Hydrogen bonding
A student runs a reaction in a beaker and as the reaction progresses, the beaker gets colder. IS this reaction exothermic or endothermic?
Endothermic because the surroundings get colder
Based on the phase change graph, which area on the graph represents the liquid phase?
B
What is the percent composition of carbon in CS2?
15.8%
Which compound is insoluble?
Pb(NO3)2, FeCl3, H2SO4, Fe(OH)3
Fe(OH)3 because hydroxide ions are (usually) insoluble
Is this molecule polar or nonpolar?
Nonpolar
What are the products of this reaction?
K2CO3 + MgF2 ->
MgCO3 + 2KF
If temperature of a gas increases, what happens to the pressure of that gas?
It also increases
Use the balanced equation to determine what mass of O2 gas would be produced when 27 g of H2O decomposes.
2H2O → 2H2 + O2
24 g O2
Why do ionic compounds conduct electricity when dissolved in water?
Ionic compounds dissociate (split up) into ions which can conduct electricity