C6: Acids, Bases and Salts Flashcards

1
Q

Alkali ions

A

OH-

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2
Q

Acid ions

A

H+

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3
Q

pH of pure water

A

pH 7

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4
Q

Salt

A

A compound formed when some or all of the hydrogen in an acid is replaced by a metal.

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5
Q

Acid + Metal ->

A

Salt + Hydrogen

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6
Q

Acid + Base ->

A

Salt + Water
(Neutralisation reaction)

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7
Q

Acid + Alkali ->

A

Salt + Water
(Neutralisation reaction)

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8
Q

Precipitate

A

An insoluble solid formed by a reaction taking place in a solution.

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9
Q

How are precipitation reactions used?

A

To remove pollutants from the waste water produced by factories.
To remove metal ions from industrial waste water.
Remove unwanted ions from drinking water.

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10
Q

Acid + Metal Carbonate ->

A

Salt + Water + CO2

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11
Q

Test for CO2

A

Limewater solution.

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12
Q

How to carry out a Titration

A
  1. Measure a known volume of alkali into a flask using a volumetric pipette. Measure from the bottom of the Meniscus.
  2. Add a few drops of indicator (phenolphthalein- Pink in alkali, colourless in acid)
  3. Pour acid into a Burette. Drop into alkali until alkali changes colour.
  4. Measure how much acid it took, an repeat until you get two identical results.
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13
Q

Where does the alkali go in a Titration?

A

The flask.

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14
Q

sums to remember

A

conc = mol/ vol and mol = mass/ Mr

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