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2.6 > Awesome Acids > Flashcards

Awesome Acids Flashcards

1
Q

What is the number range of the pH scale?

A

1-14

0-14 acceptable

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2
Q

What does the pH scale measure?

A

The acidity or alkalinity of a substance

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3
Q

What is the pH range for acids?

A

Less than 7

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4
Q

What is the pH range for alkalis?

A

Greater than 7

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5
Q

True or false?

The pH scale can only measure in whole numbers.

A

False

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6
Q

Name 3 indicators used in the lab

A

pH paper

universal indicator

red cabbage indicator

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7
Q

What is the pH value for neutral solutions?

A

7

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8
Q

Name 2 ways of moving the pH of an acid towards 7

A

Dilution with water

Neutralising with an alkali

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9
Q

What are produced when a metal reacts with an acid?

A

A salt and hydrogen

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10
Q

What is the test for oxygen?

A

It relights a glowing splint

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11
Q

What is the test for hydrogen?

A

It burns with a pop

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12
Q

What are the products of neutralisation?

A

A salt plus water

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13
Q

What type of substance would you take if you had acid indigestion?

A

A substance with a pH above 7

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14
Q

What is the reactivity series?

A

A table of metals with most reactive at top and least reactive at bottom

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15
Q

Name 2 metals that do not react with acids

A

Copper

Silver

Gold

Mercury

Platinum

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16
Q

What is meant by neutralisation?

A

The pH value moves towards and reaches 7

17
Q

How do you test for pH value?

A
  1. Add some suitable indicator to substance
  2. Match colour to appropriate colour chart
  3. Read off pH value matching that colour
18
Q

Do strong acids have a higher or lower pH than weak acids?

A

Lower

19
Q

Do strong alkalis have a higher or lower pH than weak alkalis?

A

Higher

20
Q

What type of substance would be used to treat an alkaline wasp sting?

A

A substance with a pH below 7

21
Q

What are produced in a neutralisation reaction?

A

A salt plus water

22
Q

What are the salts that form from 3 lab acids?

A
23
Q

What is an indicator?

A

A substance that changes colour when added to certain substances

24
Q

What types of plants can be used as pH indicators>

A

2.6 (3 decks)

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