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Term 3 Midterm
Test Description: This is a review for stoiciometry, acid base chemistry and molar masses
Instructions: Answer all questions to get your test result.
1) what would be an appropriate method to determine if a solution is an acid, or a base?
A
Use a pH strip.
B
Apply an electrical current.
C
Google it.
D
Taste it
2) An Arrhenius acid is a compound that dissociates in aqueous solution to form ____________ ions.
A
Chlorine Cl-
B
Hydgrogen H+
C
Hydroxide OH-
D
Sodium+
3) If universal indicator is added to an acidic solution what color will the solution change to?
A
Blue
B
Pink
C
Black
D
Green
4) If Carbonic acid (H2CO3) were put into water what electrolytes would be formed?
A
Hydrogen and Carbonate
B
Han Solo and Carbonite ions
C
Hydrogen, Oxygen, and Carbon
D
Sodium and Chlorine ions
5) Using the Arrhenius definition, classify H3PO4 as an acid, a base, or a salt.
A
Base
B
42?
C
Acid
D
Salt
6) When you neutralize an arrhenius acid with an arrhenius base what will always be produced?
A
Kool-aid
B
Ammonia
C
Water
D
Heat
7) If I have a solution with a concentration of 0.000001 (1x10-6) grams of H+ per liter it is
A
A Base
B
Super
C
Neutral
D
An Acid
8) If I react 2 moles of Sodium (Na) with 1 mole of Chlorine gas (Cl2) what will my products weigh
A
35 grams
B
23 grams
C
116 gram
D
128 grams
9) What would be a good way to test for a compounds acidity
A
Taste it
B
Guess
C
Pay a nerd to do it
D
Litmus paper
10) Write the chemical equation for the Covalent compound Nitrogen dioxide
A
N2O
B
NO
C
NO2
D
NCO
11) Balance the Equation:____ C3H8 + ____ O2 ⇒ ____ CO2 + ____ H2O
A
1, 2, 3, 4
B
4, 3, 2, 5
C
1, 4, 3, 4
D
1, 5, 3, 4
12) What is the definition for a limiting reactant
A
chemical compound formed when an acid neutralizes a base
B
Dissolving of ionic bonds when placed in water
C
all reactants are used up in a reaction
D
a reactant that is used up completely in reaction
13) How many moles are in 2.3 grams of phosphorus?
A
0.037 moles
B
0.145 moles
C
0.148 moles
D
0.074 moles
14) What pH can we expect Sodium Hydroxide to have NaOH?
A
pH?
B
pH equal to 7
C
pH less than 7
D
pH greater than 7
15) When combined with a metal a strong acid will produce what?
A
CO Gas
B
H2 Gas
C
A terrible smell
D
CO2 Gas
16) a subscript of (aq) means what
A
It is a solid
B
the sample came from under the sea
C
It is dissolved in water
D
It is a barbie girl
17) Using the Arrhenius definition, classify KCl as an acid, a base, or a salt.
A
Salt
B
Acid
C
exothermic
D
Base
18) If I am involved in an industrial accident and spill Sodium Hydroxide (NaOH) upon my hand what should I do?
A
Add enough base to raise the pH to a neutral level
B
Add enough base to lower the pH to a neutral level
C
Add enough acid to raise the pH to a neutral level
D
Add enough acid to lower the pH to a neutral level
19) A compound containing 3x10-11 hydrogen ions per liter would have a pH of ______
A
Acidic
B
11
C
-11
D
3
20) In order to dispose of chemicals into local sewer systems companies must perform an acidity check on their wastes. Why do you think that might be?
A
To justify the existence of the EPA.
B
To insure that the sewer pipes will not be unnecessarily stressed by harsh chemicals
C
To prevent environmental disturbances to pH in local water.
D
To Verify that nothing strange is dissolved in solution.
*select an answer for all questions
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