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Yr 8 Science > Acids And Alkalis > Flashcards

Acids And Alkalis Flashcards

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1
Q

What colour do acids turn litmus?

A

Red

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2
Q

What colour do alkalis turn litmus?

A

Blue

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3
Q

What colour do neutral solutions turn litmus?

A

Purple

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4
Q

Give 3 examples of acids found in everyday life.

A

Fizzy drinks, vinegar, juice, battery acid

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5
Q

Give 3 examples of alkalis found in everyday life.

A

Toothpaste, washing powder, hair dye, drain cleaner, bleach

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6
Q

What colour will universal indicator be in acids

A

Red (strong acids) orange or yellow (weaker acids)

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7
Q

What is the pH of a strong acid

A

0 or 1

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8
Q

What is the pH of a neutral solution

A

7

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9
Q

What is the pH of an acid?

A

<7

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10
Q

What is the pH of an alkali?

A

> 7

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11
Q

What is the pH of a strong alkali?

A

14

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12
Q

What colour will universal indicator be in alkalis?

A

Blue or purple

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13
Q

What colour will universal indicator be in neutral solutions?

A

Green

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14
Q

What colour is red cabbage indicator in neutral solutions?

A

Purple

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15
Q

What colour is red cabbage indicator in acids?

A

Red or pink

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16
Q

What colour is red cabbage indicator in alkaline solutions?

A

Green

17
Q

Which element do all acids contain?

A

Hydrogen

18
Q

What contains hydroxide ions?

A

Alkaline solutions

19
Q

What reaction occurs if we add an acid to an alkali?

A

Neutralisation

20
Q

Sodium hydroxide makes what kind of salts?

A

“Sodium e.g. sodium chloride”

21
Q

Potassium hydroxide makes potassium salts

A

“Potassium e.g. potassium chloride”

22
Q

Acid + alkali -> ______ + ______

A

Salt + water

23
Q

What is a base?

A

Any substance that neutralises an acid forming salt + water

24
Q

Is an alkali a base?

A

Yes! It is a soluble base

25
Q

Why are insoluble bases usually preferred to alkalis where neutralisation is required? e.g. indigestion tablets, soil pH adjustment

A

If too much alkali is added it will dissolve and make an alkaline solution. If too much insoluble base is added, the substance remains neutral because it does not dissolve.

26
Q

Give some typical properties of metals

A

Strong, high melting point, good conductor of heat and electricity, shiny when polished.

27
Q

metal + acid ->

A

“Salt + Hydrogen (remember MASH!)”

28
Q

metal carbonate + acid ->

A

salt + water + carbon dioxide

29
Q

What do you call a mixture if the solid settles out of the liquid if left to stand still?

A

Suspension

30
Q

What do you call a cloudy mixture where the solid does not settle out of the liquid if left to stand still?

A

Colloid

31
Q

What do you can a mixture where the solid is dissolved in a liquid

A

Solution

32
Q

What is a solution?

A

A mixture where a solid dissolves into a liquid

33
Q

When a solution contains the maximum amount of liquid that will dissolve in it, this is known as

A

Saturated

34
Q

What is solubility?

A

The amount of a substance that will dissolve in a given amount of liquid

35
Q

What do you call the substance that will dissolve in a liquid to make a solution

A

Solute

36
Q

What do you call a liquid into which other substances will dissolve

A

Solvent

37
Q

When a substance is dissolved in a liquid what happens to the overall mass?

A

Stays the same. Nothing “disappears” - you have the same number of atoms before and after.

38
Q

What happens to solubility as temperature increases?

A

It increases

39
Q

What happens to solubility as temperature increases?

A

It increases

Yr 8 Science (6 decks)

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