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Year 7 and 8 Science End of Year Exams > Acids And Alkalis > Flashcards

Acids And Alkalis Flashcards

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1
Q

When an acidic solution is put on red litmus paper what colour does it turn?

A

Red

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2
Q

When an acidic solution is put in blue litmus paper what colour does it turn?

A

Red

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3
Q

When an alkaline solution is put in red litmus paper what colour does it turn?

A

Blue

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4
Q

When an alkaline solution is put in blue litmus paper what colour does it turn?

A

Blue

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5
Q

When neutralising solution what is the general equation?

A

Acid + Alkali = Salt + Water

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6
Q

If a hazard symbol has an exclamation mark on it what does it mean?

A

Harmful/Caution

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7
Q

What hazard symbol causes blistering of the skin?

A

Corrosive

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8
Q

What do you wear when working with an acid labelled with a hazard symbol?

A

Goggles/Hair Tied Back/Lab Coat/Gloves

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9
Q

We dilute something when we add what to it?

A

Water

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10
Q

Adding water to dilute something makes it less what?

A

Concentrated

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11
Q

A strong acid has a hgih cponcentration of what?

A

Hydrogen

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12
Q

A strong Alkali has a high concentration of what?

A

Hydroxide

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13
Q

What acid does our stomachs produce?

A

Hydrochloric

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14
Q

Hydrochloric acid has a pH of what?

A

1

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15
Q

Why does hydrochloric have a pH of 1

A

To digest food and kill bacteria

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16
Q

When our stomachs produce too much acid what is it called?

A

Indegestion

17
Q

Indegestion remedies are what?

A

Alkali which neutralise the excess acid

18
Q

What is a base?

A

A substance that neutralises an acid – those that dissolve in water are called
alkalis.

19
Q

What is an example of Alkaline solutions

A

Sodium hydroxide (used to make soap), potassium hydroxide, oven
cleaner, toothpaste, shampoo.

20
Q

What is a scale from 1-14 which measures acidity and alkalinity?

A

pH scale

21
Q

A substance which can be used to neutralise an acid?

A

Antacid

Year 7 and 8 Science End of Year Exams (23 decks)

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