Solutions and Mixtures
A substance made of two or more substances
A mixture
The scientific principle that allows bugs to walk on water.
Surface tension
Using a filter to separate sand from water
Filtration
If you mix two substances together and a new gas is formed
A chemical reaction
What is scale we use to measure acids and bases?
pH scale
A kind of mixture where the parts are evenly spread out
A homogenous mixture
True/False --> molecules in the middle of a liquid are pulled equally in all directions
True
Using heat to remove water from a solution
Evaporation
Physical / Chemical change: Salt is mixed with water
Physical
Acids have a higher concentration of which kind of ions?
Hydrogen ions
When a substance dissolves into another
A solution
The force of attraction between molecules of a substance
Cohesion
Magnetism
Physical / Chemical change: Paper is burned
Chemical
Bases have a higher concentration of which kind of ions?
When you mix sugar and water, the sugar is the __________
Why are the molecules on top of a liquid surface harder to push apart?
They are pulled in a downwards direction more strongly than the rest of the molecules (no molecules on top to pull them upwards)
Separating substances in a mixture by smearing them on filter paper
Paper chromotography
What is the common gas produced from the chemical reactions we created?
Carbon Dioxide?
Orange juice is a(n) _____________
Acid
What is one way to increase the saturation of a solution?
Increase the heat of the solvent
How did we test for surface tension?
Water drops on top of pennies
When we collect evaporated water, we call this _____________
Simple distillation
What are the gases that make up our atmosphere?
Nitrogen, Oxygen, Carbon Dioxide
List 3 bases that we worked with in the lab
Ammonia, baking soda, liquid soap, milk