Drop the Base
To calculate the pH of a solution of CH3NH2, you first need to find what?
the pOH
For the reaction N2 (g) + 3 H2 (g) --> 2 NH3 (g), how will the equilibrium shift if the volume of the container is decreased at constant temperature?
Forward, towards the products
An element has the ground-state electron configuration [Ar] 4s2 3d10 4p3. Name the element.
Arsenic
Graph #1
2nd Order
I am a bond that believes in "sharing is caring." I happen when two non-metals can't decide who wants the electron more, so they keep it between them. What am I?
Covalent Bond
The stronger the acid the _____ its conjugate will be.
weaker
If a catalyst is added to a system at equilibrium, what is the effect on the equilibrium constant (K) and the final concentrations of products?
An unknown element X forms a compound with oxygen with the formula X2O3 and a compound with chlorine with the formula XCl3. In which group is this element likely located?
Group 13
Graph #2
C
I am a measure of disorder and chaos. The laws of the universe say I am always increasing. What am I?
Entropy
When a strong acid reacts with a weak base, the resulting solution will have a pH above or below 7?
below
If a reaction has a Q value of 50 and a K value of 10, in which direction must the reaction proceed to reach equilibrium?
Reverse, towards the reactants
As you move from left to right across Period 3, the atomic radius decreases. This is primarily due to an increase in this specific value.
Nuclear Charge
Graph #3
Water
I am a solution that resists changes in pH even when an acid or base is added. I’m usually made of a weak pair that sticks together. What am I?
A buffer
A buffer contains 0.50 M HF and 0.50 M NaF. If 0.10 moles of HCl is added to 1.0 L of this buffer, which species would decrease in concentration, HF of F-?
F-
How will the molar solubility of AgCl (s) change if a concentrated solution of NaCl is added to the saturated system?
It will decrease due to the common ion effect
A neutral Sodium atom is significantly larger than a Na+1 ion. This is because the ion has lost its valence shell and experiences less of this effect.
Electron-electron repulsion
Graph #4
Left
I am the amount of energy required to rip an electron away from an atom in its gaseous state. I get much higher once you try to take one from a full shell. What am I?
Ionization Energy
If the protonated form of an indicator [HIn] is yellow and the deprotonated form [In-] is blue, what color will the solution appear when a base is added?
Blue
For an exothermic reaction, negative enthalpy, will decreasing the temperature cause the equilibrium constant (K) to increase or decrease
Increase
Why does Oxygen have a lower first ionization energy than Nitrogen, even though it is further to the right?
Oxygen has an extra valence electron, increasing electron repulsion in its outermost shell.
Graph #5
Red
I am a substance that speeds things up without ever getting tired or used up myself. I lower the "hill" you have to climb to start a reaction. What am I?
A catalyst