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Chemistry Rev 3rd Form > 3.1 Intro to Chem > Flashcards

3.1 Intro to Chem Flashcards

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1
Q

Define a Chemical Change?

A

An irreversible Change

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2
Q

Define a Physical Change?

A

Reversible Change

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3
Q

Define an element?

A

Only one type of atom

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4
Q

Define a compound?

A

2 or more elements chemically combined

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5
Q

Define a mixture?

A

Different elements combined

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6
Q

How can you test for pure water?

A

Boil the water, pure water boils at 100 degrees

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7
Q

How can you test for the presence of water?

A

Use hydrate copper sulphate
If water is present then there’s a colour change of white to blue

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8
Q

Define Solvent?

A

The liquid the solute can dissolve in

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9
Q

Define Soluble?

A

A substance which can be dissolved

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10
Q

Define Saturated?

A

A solution which no more solute can be dissolved into

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11
Q

Define Solute?

A

The substance to be dissolved into the solution

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12
Q

Define Solution

A

Transparent mixture of a solvent with a solute dissolved in it

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13
Q

Define Insoluble?

A

A substance which can’t dissolve

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14
Q

Define Suspension?

A

Solid present in a solution becuz it didn’t dissolve

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15
Q

Name the first step in the solubility practical?

A

Place a 100cm cubed beaker on a balance, making sure it reads 0

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16
Q

Name the second step in the solubility practical?

A

Add 20g of water to the beaker

17
Q

Name the third step in the solubility practical?

A

Weigh 20g of copper sulphate crystals then add to water

18
Q

Name the fourth step in the solubility practical?

A

Stir mixture with thermometer for 2 mins

19
Q

Name the fifth step in the solubility practical?

A

Set up a filter funnel over a conical flask

20
Q

Name the sixth step in the solubility practical?

A

While stirring heat mixture via a Bunsen burner

21
Q

Name the seventh step in the solubility practical?

A

Once reached set temperature pour into filter

22
Q

Name the eighth step in the solubility practical?

A

Weigh the conical flask and filtrate on balance

23
Q

Name the ninth step in the solubility practical?

A

Pour the filtrate away and reweigh the empty conical flask.

Chemistry Rev 3rd Form (5 decks)

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