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What is the difference between a heterogenous and homogenous mixture?
Heterogenous you’re able to see physical parts of the mixture, homogenous it look as if it is one mixture.
What is it called when water bonds to itself and why?
When water bonds to itself, it is called cohesion. This happens because the solution is polar in which one end is more positive then the other.
What are the properties of water?
Cohesive
High boiling and freezing point - Strong hydrogen bonding needs lot of heat to change state of matter
Solid water floats on liquid water(Ice floats in water) - The density of ice is lower than the density of water
What is the difference between a solute and a solvent
The solvent is what dissolves the solute, while the solute is what is dissolving
Ex)When putting ice tea powder in water, the water is the solvent and the ice tea powder is the solute
Define concentration
How much solute is dissolved in a solution
What is it called when solutions have a high or low concentration
Low concentration is called diluted while high concentration is called concentrated
Can molecular compounds dissolve?
Some molecular compounds dissolve, but don’t dissolve into electrolytes in water. Molecular compounds that don’t dissolve create heterogenous mixtures.
What are solutions called when they are made out of molecular compounds?
They are called non electrolytes and cannot conduct electricity.
Define dissociation
When the bonds of an ionic compound dissolves into smaller parts; dissolving
Define electrolye
A solution able to conduct electricity
Properties of acids
Molecular
Contains hydrogen + element/polyatomic
Dissociates = forms ions
electrolyte
Always aqueos(aq)
Sour, corrosive
Ex) HBr
Litmus paper = red
Bromothymol blue = yellow
Phenolphthalein = colorless
Properties of bases
Ionic
Contains metal + OH → hydroxide
Dissociates = forms ions
Electrolyte
Always aqueos(aq)
Bitter, slippery
Ex) Al(OH)3
Litmus paper = blue
Bromothymol blue = blue
Phenolphthalein = pink
What is a pH and what does it tell you
It is a logarithmic scale that tells you how acidic something is
The concentration of acid and bases change by how much?
10 times
When the pH number increases, the concentration of acid __?
decreases by 10, the higher the number, the lower the acidity. The hydrogen ion concentration determines the pH
On the pH scale, what numbers represents acidic, neutral, and basic?
Acidic is less than 7
Neutral is 7
Base is more than 7
What are some evidence that a chemical reaction is occurring?
Formation of gas
Heating/cooling
Smell
Color change
light
2 aq solutions forming a solid
The difference between endothermic and exothermic
Endothermic absorbs heat and energy and is cold, ex) ice packs
exothermic releases heat and is hot, ex)hand warmers
What is the collision reaction theory?
A theory in which chemical reactants must collide to break bonds and make new products
What are 3 things that are conserved(stay the same) during a chemical reaction?
mass
energy
types of atoms
Total mass of reactants is equal to?
total mass of the product
Note 
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