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GCSE Chemistry > C5- Chemical Changes > Flashcards

C5- Chemical Changes Flashcards

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1
Q

Acids with Metals: REACTION

A

Acid + Metal= Salt + H gas

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2
Q

Naming Salts

A

1st word- metal
2nd word- acid
eg. Hydrochloric & Sodium = Sodium Chloride

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3
Q

Metals with Water: REACTION

A

Metal + Water= Metal Hydroxide + H gas

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4
Q

Test for Alkali

A

Blue with universal indicator/ litmus paper

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5
Q

OILRIG

A

Oxidation Is Loss

Reduction Is Gain

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6
Q

Displacement Reactions: DEFINITION

A

a more reactive metal will displace a less reactive metal from an aqueous solution of one of its salts

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7
Q

Acids with Metals: REACTION

A

Acid + Metal = Salt + H gas

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8
Q

Extracting Metals: COPPER USING CARBON: Reaction

A

CuO - Cu + CO2

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9
Q

Extracting Metals: WHERE DO METALS COME FROM? (4)

A

1) Ore mined in deep mines/quarry/ open cast mine
2) Impurities removed to concentrate metal compound
3) Metal extracted
4) Metal purified

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10
Q

Purifying Salt: METHOD

A

Crystallisation

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11
Q

Salts from Insoluble Bases: REACTION

A

Acid + Base = Salt + Base

NEUTRALISATION REACTION

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12
Q

Ionic Charges

A 
Group 1 — +1
Group 2 — +2
Group 3 — +3
Group 6 — -2
Group 7 — -1
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13
Q

Acid and Alkali: REACTION

A

Acid + Alkali - Salt + Water

TITRATION

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14
Q

Acid and Carbonates: REACTION

A

Acid + Carbonate - Salt + Water + Carbon Dioxide

(COMPLETE REACTION = No More Bubbles

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15
Q

Litmus Paper: CHANGES

A

Acidic: red
Alkaline: blue

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16
Q

Universal Indicator

A

Acidic: red
Neutral: green
Alkaline: blue/ purple

17
Q

pH meter: ADVANTAGES & DISADVANTAGES

A

Advantages: more accurate, continuous readings, can be left on its own
Disadvantages: must be calibrated

18
Q

Strong Acids (2)

A
  • Ionises/ Dissacociates completely

- More H+ ions, less pH

19
Q

Weak Acids (2)

A
  • Only partially ionises/ disassociates

- Less H+ ions, more pH

20
Q

pH from Concentration

A

1.0 = sf 0 - 0pH
0.1 = sf -1 - 1pH
0.01 = sf -2 - 2pH
etc.

GCSE Chemistry (15 decks)

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