IB Chem Jeopardy

Topics 1-3

1

1. What are the 4 states of matter?

s, l, g, aq

3

3. Which has more mass: 10 decigrams or 10 decagrams?

10 decagram

5

5. Who is the scientist credited with making the first periodic table?

Dimitri Mendeleev

7

7. How many neutrons are in Ar- 40

22

9

HL.  A mass spectrometer fragments a chemical sample and measures the _________

m/z or Mass to charge ratio

Topics 4-5

1

1.  It requires energy to _______ chemical bonds.

Break

3

3. What intermolecular force holds the 2 strands of a DNA double helix together?

H-bonding

5

5. What lab equipment is used to measure the enthalpy change of a chemical reaction?

Calorimeter

7

7. How many valence electrons participate in covalent bonds in one molecule of CO₂.

8 e­^-

9

HL. The VESPR shape that has 6 bonds and 0 lone pairs is called _______.

Octahedral

Topics 6-7

1

1.  When the energy state of the reactants is greater than the energy state of the products, the reaction is _______

Exothermic or Spontaneous

3

3. Increasing the concentration of a reactant will shift equilibrium to the ______

Right/ Products

5

5. A Maxwell-Boltzmann distribution shows the fraction of particles on the y- axis and ________ on the x-axis.

Kinetic energy

7

7. A small container shifts the equilibrium point to the side with ______ moles of gas.

Fewer/ Less

9

HL. Given the concentrations of all chemical species in a reaction, we can solve for the value of Kc using the ________ method.

I.C.E. Method (Initial, Change, Equilibrium)

Topic 8

1

1. A solution with a pOH of 2 is described as _______

Basic

3

3. A protonated water molecule is called ______

Hydronium

5

5. In a titration, the pH indicator changes color at the ______ point.

Equivalence point

7

7. I mix 5 ml of 9M hydrochloric acid with 25ml of pure water. What is the new concentration of HCl?

9/6 M or 1.5 M

9

HL. A buffer solution contains what 2 molecules?

Weak HA and A­- (or acid + its conjugate base); Or a weak base and its salt with a strong acid

Topic 9

1

1. What is the oxidation number of Ca in any ionic compounds (Calcium salts)?

2+

3

3. The glassware that holds the titrant in a titration is called _______

Burette

5

5. How many electrons are transferred in the equation: Fe2+(aq) /Fe­­3+(s) || MnO4- (aq) /Mn2+(aq)

5 e-

7

7. A ______ cell requires an external energy input to function.

Electrolytic

9

HL. What is the Atom/Molecule used as the standard to compare the reactivity of all other Atoms/Molecules in the reactivity series?

Standard Hydrogen Electrode (potential = 0 ev)