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C2 > Notes > Flashcards

Notes Flashcards

0
Q

Identify aqueous sulfate ions

A

Add drops of hcl
Shake
Add barium chloride
White precipitate of barium sulfate if present

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1
Q

Test for aqueous chloride ions

A 
Add drops of nitric acid
Shake
Add silver nitrate
White precipitate (silver chloride) 
If chloride ions present
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2
Q

Test for carbonate ions

A

Acid added to substance with carbonate ions
Co2 released
Use limewater

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3
Q

Covalent bonds have strong____ and weak____

A

Covalent bonds between atoms, weak intermolecular forces

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4
Q

Charge of covalent molecules

A

No charge

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5
Q

Giant covalent molecular structure

A

Billions of atoms

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6
Q

Boiling and melting point of giant covalent molecular structures and why

A

Really high, lots of energy required to break loads of bonds

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7
Q

Graphite conductivity

A

Yes because its in layers and can move

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8
Q

Graphite uses

A

Lubricant

Pencils

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9
Q

When two liquids dont mix completley

A

Immiscible

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10
Q

Example of immiscibility

A

Oil and water

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11
Q

Rf value

A

Distance moved by compound/distance moved by solvent

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12
Q

Uses of chromotography

A

DNA at crime scene
Forgeries
Presence of substances in foods

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13
Q

Ductile

A

Means it can be pulled out into wires

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14
Q

Crystals + water–>

A

Solution, they disolve

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15
Q

Suggest why theoretical yield was more than actual yield

A

Incomplete reaction
Unwanted reactions
Residual remained in transfer
Residual remained in other processes

16
Q

Anything hydroxide is

A

Aqueous, dissolved in water

17
Q

Empirical formula

A

Simplest whole number ratio of atoms in a molecule

18
Q

Covalent bond

A

Shared pair of electrons

19
Q

Obtaining gases from air?

A

Fractional distillation
Cooling/liquifying air
Nitrogen has a lower boiling point obtained from top of column
Oxygen opposite

20
Q

Graphite useful and because

A

Lubricant
Conductor
Pencil
Layers, 3 bonds, covalent

C2 (4 decks)

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