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Year 10 Chemistry > Neutralistation > Flashcards

Neutralistation Flashcards

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1
Q

What are the color changes of methyl orange?

A

Acid - red
Neutral - orange
Alkaline - yellow

Methyl orange is a pH indicator commonly used in titrations.

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2
Q

What are the color changes of screened methyl orange?

A

Acid - orange-red
Neutral - green
Alkaline - green

Screened methyl orange is a modified version that provides different color transitions.

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3
Q

What are the color changes of phenolphthalein?

A

Acid - colourless
Neutral - colourless
Alkaline - pink

Phenolphthalein is another commonly used pH indicator.

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4
Q

What is an alkali?

A

A soluble base

Alkalis are bases that dissolve in water, producing hydroxide ions.

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5
Q

What is a salt?

A

A compound formed when some or all of the hydrogen ions in an acid are replaced by metal ions or ammonium ions

Salts are typically formed through neutralization reactions.

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6
Q

What should you apply to a bee sting for neutralization?

A

Baking powder

Baking powder is alkaline and can help neutralize the acidity of the venom.

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7
Q

What is the difference between an alkali and alkaline?

A

An alkali is a water soluble base; alkaline refers to the property of a solution having a pH greater than seven

Understanding this distinction is important in chemistry.

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8
Q

What are the colour changes of red litmus paper?

A

Acid - red
Neutral - red
Alkaline - blue

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9
Q

What are the colour changes of blue litmus paper?

A

Acid - red
Neutral - blue
Alkaline - blue

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10
Q

What are the colour changes of universal indicator?

A

Acid - red
Neutral - green
Alkaline - purple

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11
Q

What are the colour changes of methyl orange?

A

Acid - red
Neutral - orange
Alkaline - yellow orange

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12
Q

What are the colour changes of screened methyl orange?

A

Acid - orange-red
Neutral - green
Alkaline - green

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13
Q

What are the colour changes of phenolphthalein?

A

Acid - colourless
Neutral - colourless
Alkaline - pink

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14
Q

What is an alkali?

A

Is a soluble base

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15
Q

What is the reaction of metal with acid?

A

Metal + acid = Salt + hydrogen

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16
Q

What is the reaction of acid with alkali?

A

Acid + alkali = Salt + water

17
Q

What is the reaction of acid with base?

A

Acid + base = Salt + water

18
Q

What is the reaction of acid with metal carbonate?

A

Acid + metal carbonate = Salt + water + carbon dioxide

19
Q

What is a base?

A

A substance that can react with an acid to neutralise it resulting in the formation of a salt and water. All alkalis are bases but not all bases are alkalis.

Metal oxides.

20
Q

What is an indicator?

A

It’s a chemical that gives a colour change in acidic, alkaline and neutral solutions.

21
Q

What type of scale does the universal indicator use?

A

pH scale 1-6 acidic, 7 neutral, 8-14 alkaline.

22
Q

What is neutralisation?

A

The reaction between an acid and an alkali producing salt and water.

23
Q

What salt is formed when the acid is hydrochloric acid?

A

Chloride.

Hydrochloric acid + calcium carbonate = calcium chloride.

24
Q

What salt is produced when the acid is sulphuric acid?

A

Sulfate.

Sulphuric acid + calcium carbonate = calcium sulfate.

25
Q

What salt is produced when the acid is nitric acid?

A

Nitrate.

Nitric acid + calcium carbonate = calcium nitrate.

26
Q

What is soil treatment (neutralisation)?

A

Plants grow best in pH 7 soil, so chemicals (lime) are added to raise the pH of acidic soil.

27
Q

What is indigestion (neutralisation)?

A

Indigestion is when there is too much hydrochloric acid in our stomach and the acid comes up the oesophagus; to neutralise, we take indigestion tablets.

28
Q

What is the general reaction of metal and acid?

A

Metal + acid = Salt + hydrogen.

29
Q

What are some examples of everyday neutralisation

A

Indigestion remedies
Lime in acidic soil
Baking powder on a bee sting.
Vinegar on a wasp sting

30
Q

Which is better to neutralise stomach indigestion?
Rennies or burpease

A

Rennie as it required more acid to neutralise

31
Q

If you chew an indigestion tablet , what sort of chemical is it

A

Base/alkali

32
Q

What acid is found in the stomach

A

Hydrochloric acid

Year 10 Chemistry (3 decks)

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