Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry GCSE - Paper 1 > Topic 3 - Chemical changes - acids and bases (3.1-3.14) > Flashcards

Topic 3 - Chemical changes - acids and bases (3.1-3.14) Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Geography - AQA flashcards AP® Chemistry flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route B flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
1
Q

what is an acid

A

a substance that produces hydrogen ions when dissolved in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is an alkali

A

a substance that produces hydroxide ions when dissolved in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what colour does phenolphthalein turn alkali

A

pink

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what colour does phenolphthalein turn acids

A

colourless

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what colour does litmus turn for acids

A

red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what colour does litmus turn for alkalis

A

blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what colour does methyl orange turn in alkalis

A

yellow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what colour does methyl orange turn for acids

A

red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what colour is methyl orange in a neutral solution

A

yellow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

As a hydrogen ion concentration increases by a factor of 10, what happens to the pH of the solution.

A

Decreases by 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the difference between alkalis and bases

A

alkalis are soluble bases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is formed when a base and an acid react

A

salt and water only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

acid + metal =

A

salt + hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

acid + metal oxide = ?

A

salt + water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

acid + metal hydroxide = ?

A

salt + water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

acid + carbonate = ?

A

salt + water + carbon dioxide

17
Q

measuring pH core practical

A

use a measuring cylinder to add a set volume of HCl
estimate and record the pH of the contents of the beaker
measure the mass of the Ca(OH)2 or CaO on a weighing powder
add the powdered base to the beaker
stir and record the pH of the mixture
repeat until a maximum pH of 14 occurs.

18
Q

how can you measure pH more accurately

A

use a pH probe instead of universal indicator paper as it gives you more accuracy and values to 2dp.

19
Q

How is hydrogen formed at the cathode

A

Hydrogen ions are attracted to the negatively charged cathode where they are reduced to form hydrogen atoms.

Chemistry GCSE - Paper 1 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions