Vocab-PW
The attractive force between molecules of the same substance.
What is Cohesion?
Give one real world example of adhesion and cohesion.
Acid, Base, or Both?
Reaction with litmus paper that causes color changes.
Both
What is an acid? 3 characteristics
pH less than 7
sour
non slippery
corrode metals
litmus paper: pink-red
The student has access to pure water, a weak acid, and a strong base.
Which substance should the student use to neutralize the acid, and why?
A strong base, because it reacts completely with the strong acid to neutralize it.
Action of the same attractive forces between different materials to hold a bond.
What is Adhesion?
What does it mean for a molecule to be polar?
One side of the molecule is opposite than the other.
Acid, Base, or Both?
An electrolyte that conducts electricity.
Both
What is a base?
pH greater than 7
bitter
slippery
does not react/corrode metals
litmus paper: blue to purple
How many more H+ions does a solution of pH12 have than pH9?
150 H+ions
Surface of a liquid that allows it to resist external force
What is surface tension?
How do plants receive the nutrients (food) they need? **Must use vocabulary term to answer question.
Plants utilize the Capillary Action to suck water up through their stem.
Forces of water going up against gravity and adhesion.
What is a phenomena of cohesion?
A water droplet forming a spherical shape on a car windshield.
What is a Neutral?
pH level 7
No indicator change
Green color on scale No taste (most of time)
Why do swimming pools need to be monitored for pH levels? What problems happen if the water is too acidic or too basic?
Too acidic and too basic can both affect the swimmers skin/eyes and determine the effectiveness of the chlorine level to kill germs
Movement of liquid through or along another material against an opposite for like gravity.
What is a Capillary Action?
Where does Surface Tension get its force(tension) from?
Cohesion forces create surface tension.
What role do cohesion and adhesion play in the transport of water in plants?
Adhesion allows water to stick to the walls of plant vessels in order to move throughout the plant.
What does pH stand for?
Properties of Hydrogen
In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12.
What is true about there relationship?
Both of the solution are Bases.
Provide an example of Cohesion, Adhesion, Surface Tension, and a Capillary Action.
4 examples needed to earn points.
What causes water to stick to surfaces?
The force of adhesion allows water to bond with different materials.
Based on the ideal pH range for safe swimming conditions, what action should be taken to adjust the water's pH at the public pool?
The pH level is ideal range of 7.2–7.8.
Yogurt's production and its tangy flavor, what can be concluded about its pH?
pH lower than 7
Bacteria in fruit of the yogurt contains acid
Can litmus paper tell you if a solution has a pH of 2 vs. 5? Why or why not?
Based on color the test strip changed to.