C4.5 - Titration 1️⃣✅ Flashcards

1
Q

What are the 3 indicator solutions used in a titration?

A
  • Litmus
  • Phenolphthalein
  • Methyl Orange
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2
Q

What colour does Litmus turn if an acid is present?

A

Red

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3
Q

What colour does litmus turn if an alkalia is present?

A

Blue

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4
Q

What colour does phenolphathalein turn if an acid is present?

A

Colourless

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5
Q

What colour does phenolphathalein turn is an alkalia is present?

A

Pink

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6
Q

What colour does methyl orange turn if an acid is present?

A

Red

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7
Q

What colour does methyl orange turn if an alkalia is present?

A

Yellow

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8
Q

Why do we place the conical flask on a white tile?

A

To make the colour change easier to see

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9
Q

Why do we swirl the conical flask as you add the acid/alkalia?

A

To ensure even distribution of acid/ alkali

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10
Q

What is a titre?

A

The difference between the starting volume and the end volume of acid/alkalia to work out the total volume of alkalia/acid added to the flask in total.

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11
Q

What are th main 5 specialist equipment used in titration?

A
  • Pipette
  • Conical Flask
  • Burette
  • White Tile
  • Pipette filler
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12
Q

What is the 1st step in titration?

A

Use your pipette to add 25cm3 of alklakia/acid to a clean conical flask

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13
Q

What is the 2nd step in titration?

A

Add a few drops of indicator and put the conical flask on a white tile

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14
Q

What is the 3d step in titration?

A

Fill the burette with acid/alkalia and note the starting volume

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15
Q

What is the 4th step in titration?

A

Slowly add the acid/alkalia from the burette to the alkalia/acid in the conical flask, swirling to mix - adjust tap to let out 1 drop at a time , swrirling continuously

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16
Q

What is the 5th step in titration?

A

Stop adding acid/alkalia when the end point is reached e.g. when the acid/alkalia is neutralised by the alkalia/acid and the indicator changes colour

17
Q

What is the 6th step in titration?

A

Note the final volume reading and calculate your titire.

18
Q

What is the 7th step in titration?

A

Repeat your titration until your titres/ results are concordant.

19
Q

What do concordants results mean?

A

Concordant results are results/ volumes of acids that are within 0.10 cm3 of eachother

20
Q

What is the 8th step in titration?

A

Finally use your concordant titres to work out a mean volunme of acid required to neutralise that alkalia/acid