Show:
Reactions and Stoichiometry
Electronic Structure, Periodicity and Bonding
Energetics and Kinetics
Equilibrium and REDOX
Chemistry Pot Luck
100

A reaction that produces a gas is carried out in a sealed vessel on a balance. What happens to the mass the balance shows, as the reaction proceeds?

It does not change

100
How many unpaired electrons does a ground state N atom have?
3
100
What is the average kinetic energy per particle more commonly called?
Temperature
100

When a system is at equilibrium, the concentrations of all species are __________________?

Constant

100

What is the only letter that doesn't appear on the Periodic Table?

J                                         (also Q, now that Uuq has been renamed)

200
Which of these is a weak acid? C6H12O6, H2SO4, HNO3, HF, HClO4
HF
200
Out of C, Si and P: which has the highest electronegativity?
C
200

What happens to the enthalpy of a system during an endothermic process?

It increases

200

If a system has a Q value greater than Kc: to which side does the system shift as it comes to equilibrium?

The left

200

Apart from Hg, what is the only element that is a liquid at room temperature and pressure?

Bromine (Br2)

300
What is the formula of the precipitate formed when ammonium sulfate solution reacts with strontium nitrate solution?
SrSO4
300
Which of these elements has the lowest first ionization energy: Mg, Al, Si, P, B, C, N ?
Al (dip after Mg)
300
What is the sign of "delta H of vaporization" and how does its magnitude compare to "delta H of fusion" for a typical substance?
The sign is positive (endothermic) and it is generally greater than "delta H of fusion"
300

In a voltaic cell that is running, which half cell do the anions move towards in the salt bridge?

Anode (oxidation) half cell

300

Which form (allotrope) of oxygen is formed in lightening strikes?

Ozone (O3)

400
How many moles of oxygen gas are required to completely burn 4 moles of methanol (CH3OH)?
2CH3OH + 3O2 gives 2CO2 + 4H2O 6moles of O2 are required
400
What is the correct explanation for why a sulfide ion has a larger radius than a sulfur atom?
Increased electron-electron repulsion in the outer shell
400

Describe the graph of concentration vs time for a zero order reactant (single experiment)

Straight line with negative slope

400

In the electrolysis of concentrated NaCl(aq), what is produced at the anode?

Chlorine gas (not O2 from water)

400
The most abundant element in the universe.

What is Hydrogen?

500
What piece of glassware is used to make up an exact 1.000M solution of NaCl(aq)?
Volumetric flask
500

Which of these compounds has the largest lattice enthalpy? magnesium oxide, aluminium nitride, sodium chloride, rubidium bromide

aluminium nitride

500

For the plot of lnk vs 1/T, what does the slope of the line equal?

-Ea/R

500

An equilibrium is endothermic in the forward direction. What (if anything) happens to the following when the temperature is decreased:                 a) value of Kc   b) amount of reactants in the mixture 

a) Kc decreases b) the amount of reactants increases

500
How many different Science themed Ties does Mr. Isaacs own?

3