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Science > Acids And Bases > Flashcards

Acids And Bases Flashcards

1
Q

What are acids?

A

Substances that release hydrogen ions (H⁺) in water

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2
Q

What are bases?

A

Substances that release hydroxide ions (OH⁻) in water

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3
Q

What are alkalis?

A

Bases that dissolve in water

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4
Q

What is the taste of acids?

A

Sour

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5
Q

What is the pH of acids?

A

Less than 7

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6
Q

What happens when acids react with metals?

A

Produces hydrogen gas

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7
Q

Complete the reaction: Acid + Metal → _______ + Hydrogen gas

A

Salt

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8
Q

What color does litmus paper turn in the presence of an acid?

A

Red

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9
Q

What is the taste of bases?

A

Bitter

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10
Q

What is the touch sensation of bases?

A

Slippery; soapy feel

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11
Q

What is the pH of bases?

A

Greater than 7

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12
Q

Complete the reaction: Base + Acid → _______ + Water

A

Salt

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13
Q

What color does litmus paper turn in the presence of a base?

A

Blue

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14
Q

What does the pH scale measure?

A

How acidic or basic a substance is

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15
Q

What is the pH value for neutral substances?

A

7

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16
Q

List three common acids

A
  • Hydrochloric acid (HCl)
  • Sulfuric acid (H₂SO₄)
  • Acetic acid (CH₃COOH)
17
Q

List three common bases

A
  • Sodium hydroxide (NaOH)
  • Calcium hydroxide (Ca(OH)₂)
  • Ammonia (NH₃)
18
Q

What are indicators?

A

Chemical dyes that change colour depending on the PH

19
Q

What color does litmus paper turn in acids and bases?

A

Acids: Blue → Red, Bases: Red → Blue

20
Q

What does phenolphthalein indicate?

A

Colorless in acids, pink in bases

21
Q

What is the general equation for neutralization?

A

Acid + Base → Salt + Water

22
Q

What is one application of neutralization in medicine?

A

Antacids neutralize stomach acid

23
Q

What are two everyday uses of acids?

A
  • Lemon juice (citric acid)
  • Vinegar (acetic acid)
24
Q

What are two everyday uses of bases?

A
  • Soap (sodium hydroxide)
  • Cleaning agents (ammonia)
25
Q

What is a catalyst

A

Something that speeds up a chemical reaction

Science (14 decks)

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