Q.1
The pH value of an acid represents its __________ of positive ions in the solution
  • amount
  • concentration
  • color
  • charge
Q.2
Which of the following is a property of a base?
  • bitter taste
  • reacts with metals
  • salty
  • sour taste
Q.3
Bases have many uses. They are mainly used to make
  • cleaning products
  • soaps
  • concrete
  • all of the answer choices
Q.4
The higher the concentration of negative (hydroxide) ions in the solution, the stronger the base is.
  • True
  • False
Q.5
All bases have a sour taste.
  • True
  • False
Q.6
Which of the following pH values represents a base?
  • 2.1
  • 4.6
  • 6.8
  • 8.1
Q.7
The strongest bases have pH values close to
  • 0
  • 14
  • 7
  • 5
Q.8
Ocean water is only slightly basic. What might its pH value be?
  • 5
  • 8
  • 12
  • 2
Q.9
Bases turn blue litmus paper red.
  • True
  • False
Q.10
Which of these pH values represent an acid?
  • 4
  • 8
  • 10
  • 12
Q.11
Phenolophalein turns from clear to pink when the pH turns
  • acidic
  • basic
  • saline
  • ionic
Q.12
What is a titration?
  • when the moles of hydrogen ions is equal to the moles of hydroxide ions
  • adding a known amount of solution of known concentration to determine the concentration of an unknown
  • reaction in which an acid and a base react in an aqueous solution to produce a salt and water
  • the extent of ionization of an acid or base
Q.13
KOH is ...
  • an acid
  • a base
  • a salt
  • an ionic compound
Q.14
Releases hydrogen in an aqueous solution.
  • base
  • strong base
  • acid
  • weak base
Q.15
HNO2
  • a base
  • a salt
  • an acid
  • an ionic compound
Q.16
HF is...
  • an acid
  • a base
  • a salt
  • an ionic compound
Q.17
A substance is found to have the following characteristics:Very bitter taste Feels slippery to the touch Produces OH- ions when dissolved in water In what category would the substance be classified?
  • acid
  • base
  • enzyme
  • fatty acid
Q.18
Acids react with
  • water to produce bases and salts
  • salts to produce bases and water
  • neither bases, salts nor water
  • bases to produce salts and water
Q.19
The pH of a solution is 2.What is the [OH-] concentration?
  • 1x10-12M
  • 12 M
  • 1x10-2M
  • 2 M
Q.20
What is the pH of a solution where the [H+] is 1.0 x 10-11?
  • 11
  • 13
  • 14
  • 1
0 h : 0 m : 1 s