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JC Science > Chapter 26 - Acids & Bases > Flashcards

Chapter 26 - Acids & Bases Flashcards

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Biology 101 flashcards
1
Q

Acids have a _____, _____ taste

A

Acids have a sour, sharp taste

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2
Q

Give examples of everyday acids

A

Lemon juice (citric acid)
Rainwater (carbonic acid)
Vinegar (dilute ethanoic acid)

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3
Q

Give examples of lab acids

A 
Hydrochloric acid (HCl)
Sulfuric acid (H2SO4)
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4
Q

Many bases have a _____ feel

A

Many bases have a soapy feel

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5
Q

True of false: bases are corrosive

A

Yes some bases can be corrosive

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6
Q

Give examples of everyday bases

A

Toothpaste
Bleach
Indigestion tablets

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7
Q

Give examples of lab bases

A 
Sodium hydroxide (NaOH)
Calcium carbonate (CaCO3)
Limewater Ca(OH)2
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8
Q

Alkalis

A

A base which is soluble in water

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9
Q

Give an example of an alkali

A

sodium hydroxide

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10
Q

What is neutral?

A

Substances that are neither acidic nor base

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11
Q

Indicators

A

Substances that change colour depending on whether they are in acidic or basic substances

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12
Q

Litmus is a qualitative test. What does this mean?

A

It tells us whether a substance is acid or base but not how acidic or basic

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13
Q

The pH scale

A

Indicates the acidity or basicity of a solution; it runs from 0 to 14

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14
Q

pH 7 is _______

A

neutral

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15
Q

Below pH 7 indicates ________

A

acidity

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16
Q

Above pH 7 indicates _____

A

basicity

17
Q

Using a universal indicator or pH meter to measure a pH are quantitative tests. What does this mean?

A

They give a value of how acidic or basic the substance is

18
Q

What is the word equation for a neutralisation reaction?

A

an acid + a base —–> salt + water

19
Q

What’s the word equation for the reaction of an acid with a carbonate?

A

an acid + a carbonate —–> salt + water + carbon dioxide

20
Q

Titrations

A

Allow you to find exactly how much acid is needed to neutralise a base

21
Q

What are the chemical and word equations for the titration of sodium hydroxide and hydrochloric acid?

A

hydrochloric acid + sodium hydroxide —-> sodium chloride + water

HCl + NaOH —> NaCl + H20

JC Science (44 decks)

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