Solutions
Separating Solutions
Properties of Solutions
pH (#5 is hard!)
pH II (#5 is hard!)
100
Give two examples of a solution
Many answers! (e.g. honey in tea)
100
What is evaporation?
When a liquid becomes a gas
100
Name two ways you can speed up the rate of dissolving/dissolution
Heat, movement (e.g. boiling, stirring)
100
What does pH measure?
pH measures the concentration of hydrogen ions (H+) in a solution
100
Are tears acidic, neutral or basic?
200
A solution occurs when at least one substance is _______ by another substance in a mixture.
dissolved
200
What is condensation?
When a gas becomes a liquid
200
What is concentration?
How much solute is dissolved in a solution.
200
The more hydrogen ions a solution has, the more ______ it is.
Acidic
200
The less hydrogen ions a solution has, the more ______ it is.
Basic
300
What does being dissolved mean?
Becoming a part of something else completely
300
Is evaporation a natural or unnatural process? Give an example of evaporation.
Natural, many answers e.g. a shirt drying
300
How can you tell a solution is over-concentrated?
You can still see some of the solute.
300
What is the pH of a completely neutral solution?
Seven!
300
The most acidic solution ever would have a pH of...
Zero!
400
What is a solute?
A solute is the part of a solution that is dissolved.
400
What is crystallization?
Crystallization happens when the solute in the solution hardens into a crystal.
400
Why does an egg float on top of salt water but sink in tap water?
The more saturated/concentrated a solution, the more dense it is.
400
Why do extremely acidic and extremely basic solutions burn your skin?
They are trying... to... dissolve you!
400
What are hydrogen ions?
Hydrogen ions are charged hydrogen atoms.
500
What is a solvent?
A solvent is the part of a solution that dissolves the solute.
500
What is distillation?
Distillation is fast and intentional. We boil a liquid then condense the vapor back to liquid. It helps get rid of ‘impurities’ like chemicals in water.
500
Why does movement make chemicals react more quickly?
The particles collide quickly, producing the reactions.
500
What does pH stand for?
potential of Hydrogen
500
What happens if you mix an acidic solution and a basic solution?
A neutral solution forms