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SEMESTER EXAM OH NO
yeah i hope i pass idk
17
Chemistry
10th Grade
01/17/2013

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Term

Physical seperation based on the different boiling points of the substances in the mixture.

What seperation method is this?

Definition

Distillation

(picture water being boiled and dripping down into a beaker)

Term
Method of physical seperation based on different sized partices of the substance in a mixture
Definition
Filtration
Term
How do you properly smell a chemical in a lab?
Definition
Wafting
Term
What is the proper lab technique for diluting an acid?
Definition
Pour water in the acid while stirring
Term
A ________ is formed by losing electrons.
Definition
A cation
Term
A _______ is formed by gaining electrons
Definition
An anion.
Term
Which has a neutral charge and is found in the nucleus?
Definition
a Neutron
Term
Which is negative and is found in the electron cloud?
Definition
an electron
Term
which is positive and is also found in the nucleus?
Definition
protons
Term
What is Hunds Rule?
Definition
that each blank in the electron orbital thing must be filled up before you can go back and add more to it
Term

A+B->AB

or

2H2+O2-> 2H2O

What reaction is this?

Definition

Synthesis reaction

Synthesis= putting together, combining.

Term

AB->A+B

or

2NaCl->2Na+Cl

Which reaction is this?

Definition

Decomposition

Decomposition= de-compose=to break down.

Term

Is this endo or exo thermic?

A+B->C+D+Energy

Definition
Exothermic
Term

Does this describe endo or exo thermic?

* -/\ H (Negative Delta H)

* Realeases energy

* Heat goes on the right

* Decomposition, Gas -> Solid

* Heat of Vaporization, Gas -> Liquid, Condensation

* Heat of fusion, Liquid -> Solid, Freezing


Definition
These are all exothermic
Term

Does this describe endo or exo thermic?

* + /\ H (positive Delta H)

* Absorbs Energy

* kJ+R->P (kJ=kilo joules)

* Heat on the left

* Heat of fusion, Solid -> Liquid, melting

* Sublimation, Solid -> Gas

* Heat of vaporization, Liquid -> Gas, Boiling


Definition
These are all ENDOTHERMIC
Term

Which one is this?

1 mol

 molar

mass

Definition
Grams to Moles 
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