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Science > Acids And Bases > Flashcards

Acids And Bases Flashcards

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1
Q

What is an acid?

A

A type of chemical that devolves in water?

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2
Q

What is used to measure the acidity of a substance?

A

The PH scale

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3
Q

What is a base?

A

A base is a chemical that can neutralize an acid

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4
Q

At what pH is a substance neutral?

A

7

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5
Q

At what pH is a substance a weak acid?

A

5/6

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6
Q

What does alkalis mean?

A

It is a base that is soluble in water

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7
Q

What are the properties of a base?

A

They taste bitter
They feel slippery on the skin
Bases that are alkalis will dissolve in water
Many bases are dangerous to taste or feel

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8
Q

What is a neutral substance?

A

A neutral substance is neither a base more an acid

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9
Q

What are the properties of an acid?

A

They are soluble In water
They taste sour
Acids feel rough on the skin
Many acids are dangerous to touch or feel

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10
Q

What are the properties of a neutral substance?

A

There are no specific properties

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11
Q

Where on the pH scale is strong bases?

A

13/14

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12
Q

Where on the pH scale are weak bases.

A

8/9

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13
Q

How can we test for an unknown substance.

A

Using a acid-base indicator

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14
Q

What are some acid-base indicators?

A 
Red cabbage water
Universal indicator 
Bromothymol blue
Phenolphthalein
Litmus paper
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15
Q

What are the different tastes the human tongue can sense?

A

Salty
Sweet
Sour
Bitter

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16
Q

What does the pH of a solution refer to?

A

How acidic or alkaline/basic a solution is

17
Q

What are some examples of acids?

A

Fruit juice
Vinegar
Swimming pool acid
Tartaric acid

18
Q

What are some examples of bases?

A

Bicarbonate of soda
washing powder
soaps
And other household cleaners

19
Q

What are acid-base indicators used to test?

A

Whether a substance is acidic or basic

20
Q

What does red litmus paper do when put into an acid?

A

It stays red

21
Q

What does red litmus paper do when put in a base?

A

It turns blue

22
Q

What does blue litmus paper do when put into an acid?

A

It turns red

23
Q

What does blue litmus paper do when put into a base?

A

It stays blue

24
Q

Does litmus paper identify a neutral substance? Explain

A

No. Litmus paper can only identify a base or an acid, therefore, more tests should be conducted

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