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
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