What is the function of a catalyst (how does it speed up reactions)?
It lowers the activation energy barrier.
100
Is HCl an acid or base? Is NaOH an acid or base?
HCl is an acid. NaOH is a base.
100
Write the products of the reaction NaOH +HCl
NaCl + H2O
200
What are isotopes? What is an ion?
Isotopes are 2 atoms of the same element that have differing numbers of neutrons. An ion is a charged atom/molecule.
200
Which way does the rxn (on board) shift when reactants are added? When products are taken away?
To the products (right) in both cases.
200
How did we measure the rate of the decomposition of hydrogen peroxide?
We measured the pressure increase as the oxygen gas was produced.
200
What is an acidic pH, neutral pH, and basic pH?
Acidic- below 7, neutral at 7, Basic- above 7
200
Write the products of the following reaction and balance the equation? NaOH+H2SO4-->
2 NaOH + H2SO4 -> 2 H2O + Na2SO4
300
How many protons, neutrons, and electrons are in (on board)?
15 protons, 16 neutrons, 18 electrons
300
Which way does an endothermic rxn shift when heat is added?
Towards the products. Towards the “right”.
300
What is not a product or reactant and emerges unconsumed in the reaction?
Catalyst
300
Which 2 places in the body do not maintain a nearly neutral pH?
Stomach (acidic) and small intestine (basic)
300
Balance the following equation
H3PO4 + Ba(OH)2 --> H20 + Ba3(PO4)2
2 H3PO4 + 3 Ba(OH)2 --> 6 H20 + Ba3(PO4)2
400
What are valence electrons? Why are they important?
Valence electrons are the outermost electrons. They participate in bonds and determine reactivity.
400
A catalyst is added to a reaction at equilibrium, how does it make more products?
It DOESN’T! Tricked you.
400
A DNA mutation renders an enzyme useless. What most likely changed due to the mutation?
The confirmation of the protein. Its shape.
400
Where is the equivalence point (below, at, or above 7) in the following titrations 1. strong acid and strong base 2. strong acid and weak base 3. weak acid and strong base)
7, below 7, above 7
400
Draw the Lewis structures for CH4 and CO2
On Board
500
How many protons, neutrons and electrons are in (on board), and why is it unlikely to exist?
10 protons, 10 neutrons, 11 electrons. It is a noble gas, which already has a complete octet.
500
What happens to the pH of the blood when a person is hypoventilating (breathing very slowly)
pH lowered. The hydrogen concentration increases.
500
Name at least 2 of the 4 different factors we discussed that can affect the rate of a reaction.
Nature of rxn, presence of a catalyst, temperature of the reaction, and concentration of reactants
500
What happens to the pH of the blood when carbon dioxide is removed (on board)?
pH increases
500
Look at the molecule (CO3)2-. All three bonds are actually equal in length. What are the different ways to draw this molecule called?