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WorksheetsCh. 18 Test
Total questions: 20
Worksheet time: 25mins
Svante Arrhenius suggested that acids are compounds that contain which element?
Oxygen
Hydrogen
Carbon
Sodium
Svante Arrhenius defined bases as substances that dissolve in water to release _____________ ion.
Hydrogen (H+)
Hydroxide (OH-)
Hydronium (H3O+)
Chlorine (Cl-)
What is another term for a Hydrogen ion?
proton
neutralizer
litmus
salt
According to the Bronsted-Lowry definition, acids are proton donors.
true
false
The chemical formulas for all bases end with Hydroxide (OH).
true
false
Examine the following chemical formulas: HCl, HNO3, and H2SO4. Would you predict these are acids or bases?
acids
bases
Which of the following are properties of acids? (you can select more than one answer)
change blue litmus paper to red
change red litmus paper to blue
taste sour
feel slippery
pH values range from 0-6
Which of the following are properties of bases? (you can select more than one answer)
change blue litmus paper to red
change red litmus paper to blue
taste sour
feel slippery
pH values range from 8-14
An unknown solution contains exactly equal amounts of Hydrogen (H+) and Hydroxide (OH-) ions. What would you predict the pH of this solution to be?
3
7
10
Basic solutions contain more Hydroxide (OH-) ions than Hydrogen (H+) ions.
true
false
What determines the pH value of a substance?
the color
the smell
the amount of H+/H3O+
the amount of salt
These solutions resist changes in pH when acids/bases are added:
neutral
litmus
buffers
salt
HF is an acid that does NOT ionize completely when added to water. What kind of acid is HF?
strong
weak
NaOH is a base that ionizes completely when added to water. What kind of base is NaOH?
strong
weak
Acids can be very dangerous, but bases are not harmful.
true
false
Imagine that you complete a difficult workout and your blood pH becomes more acidic because of an increase in CO2 and H+. How will your blood buffer system counteract this?
parts of the buffer system will release more H+
parts of the buffer system will bind with the extra H+
The initial pH values of Beaker A and Beaker B are recorded to be 7.0. You add 1.0 mL of a strong acid to both beakers. The final pH value of Beaker A is 3.0. The final pH value of Beaker B is 6.9. Which beaker contains a buffer?
Beaker A
Beaker B
Which of the following are always the products, or ending substances, of a neutralization reaction? (you may select more than one answer)
acid
base
salt
water
A compound formed when the negative ion from an acid combines with the positive ion from a base is a(n):
salt
ion
acid
base
Predict the formula of the salt that will be formed if HNO3 and KOH react:
HOH
KNO3
KNOH
HNK
