Brainscape's Knowledge GenomeTM

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


See full index

Pro Chem > C5 > Flashcards

C5 Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Chemistry flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
1
Q

Why is electrolysis used to extract some metals?

A

If the metal reacts with carbon or is too reactive to be extracted using carbon

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

What type of reaction happens when a compound breaks down?

A

Decomposition

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

What type of indicator is used in a titration?

A

A single indicator because it has a sudden colour change (end-point)

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

What is the reaction between an acid and alkali called?

A

Neutralisation reaction: Acid + Base –> Salt + Water

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

What is an alkali?

A

An alkali is a base that dissolves in water to form a solution with a pH greater than 7. Alkalis form OH- ions in water.

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

What is an acid?

A

An acid is a substance that forms aqueous solutions with a pH of less than 7. Acids form H+ ions in water.

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

What is a weak acid?

A

A weak acid is partially ionised in aqueous solution

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

What is a titration used for?

A

If the volumes of 2 solutions that react completely are known and the concentration of 1 solution is known, the concentration of the other solution can be calculated.

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

What is a strong acid?

A

A strong acid is an acid that is completely ionised in aqueous solution

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

What is a reaction that separates a metal from its oxide called?

A

A reaction that separates a metal from its oxide is called a reduction reaction

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

What is a pipette used for?

A

To measure a fixed volume accurately

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

What is a pH scale?

A

A pH scale is a measure of how acidic or alkaline a solution is

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

What is a displacement reaction?

A

When a more reactive metal can displace a less reactive metal from a compound

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

What is a burette used for?

A

To measure a variable/continuous volume

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

What is a base?

A

A base is a substance greater than a pH of 7

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

What happens when an acid reacts with a metal?

A

Acid + Metal —> Salt + Hydrogen

17
Q

What happens when an acid reacts with a metal oxide/hydroxide?

A

Acid + Metal Oxide/Hydroxide —> Salt + Water

18
Q

What do we call reactions which involve both oxidation and reduction reactions?

A

Redox reactions

19
Q

What do metals form?

A

Positive ions, they lose electrons. All elements in the reactivity series form positive ions.

20
Q

What are the products of the reaction of sodium and water?

A

Sodium Hydroxide + Hydrogen

21
Q

Steps of a titration

A
  • alkali in burette
  • acid in a conical flask measured out with 25cm^3
  • add a few drops of indicator
  • add alkali to acid until colour changes
  • swirl conical flask
  • add alkali drop wise towards the end
  • note final burette reading
  • repeat for accurate results
22
Q

Name an indicator suitable for a titration

A

Methyl orange (yellow in alkalis and red in acids)

23
Q

Name a strong acid

A

Hydrochloric acid, nitric acid, sulfuric acid

24
Q

Metal carbonates and metal hydroxides are examples of

A

Bases

25
Q

How can you form a metal hydroxide and hydrogen gas?

A

Metal + Water —> Metal Hydroxide + Hydrogen

26
Q

Describe a method to make pure, dry crystals of magnesium sulfate from a metal oxide and dilute acid

A
  • Pour sulfuric acid and excess magnesium oxide into a conical flask
  • Heat it on a bunsen burner and stir with a glass rod
  • After 3-4 minutes, filter out the excess magneisum oxide using a filter paper and a flask
  • Boil the filtrate using an evaporating basin
  • Move the bunsen burner in and out to make sure crystals form
  • Leave to allow all water to evaporate in evaporating basin
27
Q

____ + __ __ —> Salt + Water + Carbon Dioxide

A

Acid + Metal Carbonate

Pro Chem (15 decks)

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