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Chemistry > pH Scale > Flashcards

pH Scale Flashcards

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1
Q

Colour of a strong acid

A

Red/ orange

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2
Q

What is the colour of neutral on pH scale

A

7 green

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3
Q

acids (numbers on pH scale)

A

0-6

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4
Q

Alkalis numbers on pH scale

A

8-14

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5
Q

What are two ways you can measure the pH of a solution

A

pH meter and universal indicator paper

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6
Q

3 ways to measure the pH

A

pH meter, universal indicator or UI paper

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7
Q

What does the pH scale do

A

Measure of acidity of alkalinity of a solution

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8
Q

What is hydrochloric acid (formula)

A

HCl

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9
Q

What is sulphuric acid formula

A

H2SO4

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10
Q

What is the formula of carbonic acid

A

H2CO3

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11
Q

Do strong acids fully or partly dissociate

A

Fully

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12
Q

What is complete dissociation

A

Where a solution has none of the original molecules remaining after reacting

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13
Q

What is a base

A

A metal oxide or hydroxide that react with acids to produce salt and water

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14
Q

What salt does hydrochloric acid make

A

(Metal) chloride

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15
Q

What salt does sulphuric acid make

A

(Metal) sulphate

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16
Q

What salt does nitric acid form

A

(Metal) nitrate

17
Q

hydrochloric, sulphuric and nitric acids are all examples of…

A

Strong acids

18
Q

What is a salt?

A

An acid where the hydrogen has been removed and replaced with a metal

19
Q

How do you write the name of a salt?

A

Metal + salt formed from acid

eg. magnesium chloride (hydrochloric acid + magnesium)

20
Q

What does an acid + metal produce

A

salt + hydrogen

21
Q

What does an acid + metal oxide produce

A

salt + water

22
Q

What does an acid + metal carbonate produce

A

salt + carbon dioxide + water

23
Q

What makes an acid strong

A

When it is fully ionised in an aqueous solution

24
Q

small amount of solvent and lots of solute

concentrated or dilute?

A

Dilute

25
Q

what is concentrated

A

little amount of solute and large volume of solvent (acid)

26
Q

All acids are…? (State symbol)

A

(aq)

27
Q

What is the copper (II) oxide formula

A

CuO

28
Q

In the required practical what does filtering the solution do?

A

Removes unreacted CuO that was added after its maximum that could dissolve in the amount of acid.

Chemistry (6 decks)

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