WorksheetsAcids/Bases and pH (plus review)
Total questions: 25
Worksheet time: 25mins
What is the atomic number of this element?
7
14
28
3.5
The scale shows the pH values for Solutions W, X, Y, and Z. Which statement correctly describes the relationship between solutions?
Solution Z is more acidic than Solution X
Solution W is more basic than Solution X
Solution X is more acidic than Solution W
Solution W is more acidic than Solution Y
According to the pH scale, which pH would be the strongest acid?
3
6
9
12
Which conclusion about Solution Z is BEST supported by the data?
Solution Z is acidic
Solution Z is neutral
Solution Z is more basic than Solution Y
Solution Z is more acidic than Solution X
What is an isotope?
a version of an element that has a different number of electrons
a version of an element that has a different number of protons
a version of an element that has a different number of neutrons
a version of an element that bonds ionically
Peat moss puts out Hydrogen ions in exchange for absorbing Ca and Mg ions. By adding hydrogen ions to the water around it, how is the moss affecting the pH of the bog?
It's making it more basic
It's making it more acidic
It's making it more neutral
It's not affecting the pH at all
When a solutin has a pH between 0 and 6.99 we classify this as...
Neutral
Basic
Acidic
Ionic
When added to solutions, acids....
donate protons
recieve protons
steal electrons
give up electrons
What is the atomic mass of oxygen?
8
16
32
4
When added to solutions, bases....
donate protons
recieve protons
steal electrons
give up electrons
When bonding, metals are more likely to _________ electrons and form ________ (these have a positive charge).
give up, cations
give up, anions
steal, cations
steal, anions
When nonmetals steal electrons, they get a negative charge. What do we call a negatively charged ion?
cation
anion
dogion
ion
Each step in the pH scale represents how much change in hydrogen ion concentration?
100X change
50X change
10X change
1000X change
HCl has a pH of 1, this means its H+ concentration is 10-1. Pure water has a pH of 7, this means its H+ is 10-7. How much more acidic is HCl than water?
10 X
100 X
100,000,000 X
10,000 X
What is the difference between Carbon-12 and Carbon-14?
the number of neutrons
the number of protons
the number of electrons
there is no difference
Boron's atomic number is 5 and its mass is 10. How many protons does it have?
10
15
5
1
Vandium has 23 protons, 23 electrons, and 28 neutrons. What is its atomic mass?
23
46
51
15
When a solution has a pH that falls between 7.01 and 14, we classify this as...
Basic
Acidic
Neutral
Ionic
How many valence electrons do halogens have?
1
3
5
7
Which of these wells MOST likely had water with a metallic taste?
Well 1
Well 2
Well 3
Well 4
Which of these substances is closest to neutral?
Bleach
Lemon Juice
Human Blood
Milk
When you mix an acid and a base....
the solution becomes neutral (forms water)
the solution explodes
the solution changes color
the solution evaporates
Water from the hot springs near the Ebeko volcano has a very low pH. A low pH indicates which of the following about the water?
It has no H+ or OH- ions
It has equal concentrations of H+ and OH- ions
It has high concentrations of H+ ions
It has equal amounts of positive and negative ions
A sample of vinegar has a pH of 5, and a sample of rainwater has a pH of 6. Which of the followign statements BEST describes these two substances?
Both samples are bases, and vinegar is more basic
Both samples are acids, and vinegar is more acidic
Both samples are bases, and rainwater is more basic
Both samples are acids, and rainwater is more acidic
How many valence electrons do elements in group 2 have?
1
2
3
4
