Vocabulary: acid, acidic, alkaline, base, indicator, neutral, pH Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. Acids are substances that produce hydrogen ions (H") when dissolved in water. Lemon juice is an
example of an acid.
A. What does lemon juice taste like?
B. What does it feel like if lemon juice gets in your eye?
2. Bases are substances that produce hydroxide ions (OH) when dissolved in water. Hand soap is an
example of a base.
A. What does soap feel like?
B. What does soap taste like?
C. What does it feel like if soap gets in your eye?
Gizmo Warm-up

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

the correct answer would be b) volume versus temperature, because they are also directly proportional.