Chemistry Unit 2

These revision cards are based around 'more about acids and bases'

HideShow resource information

What is a H+ ion?

Answer: a hydrogen atom that has lost its electron- in other words it is simply a proton

1 of 27

What does it mean when we say a proton is hydrated

Answer: it means as we dissolve it in water, it becomes surrounded by water molecules to keep it in solution

2 of 27

What is an alkali?

Answer: a base that is dissolved in water

3 of 27

What ions does a base produce when we dissolve it

Answer: it produces OH- ions

4 of 27

What is another name for an acid?

Answer: a proton donor

5 of 27

What is another name for an alkali? Why?

Answer: a proton acceptor because the hydroxiide ions from an alkali combine readily with protons (H+ ions) to form water

6 of 27

Give 3 examples of strong acids

Answer: Hydrochloric, sulfuric, nitric

7 of 27

Give 2 examples of strong alkalis

Answer: sodium hydroxide, potassium hydroxide

8 of 27

Give 1 example of a weak acid

Answer: any from- ethanoic, citric, carbonic

9 of 27

Give 1 example of a weak alkali

Answer: ammonia solution

10 of 27

What are the two main ways of telling if an acid i

Answer: 1. Measuring the PH of a strong and a weak, and the strong acid will have a lower PH

 2. By Observing the rate of reaction when we add a reactive metal to the acid

11 of 27

What happens when we add an acid solution to an al

Answer: it produces, a neutralisation solution

12 of 27

What is the process called in which we can measure

Answer: titration

13 of 27

In titrations, what is the point called at which t

Answer: the end point

14 of 27

What indicator should we use if we react a strong

Answer: any indicator is suitable as it is neutral

15 of 27

What indicator should we use when we react a weak

Answer: phenolphthalein

16 of 27

What indicator should we use when we react a stron

Answer: methyl orange

17 of 27

What are the two calculations we use to work out t

Answer: 1. mass/ relative formula mass

 2. concetration x (volume / 100)

18 of 27

How do we describe the concentration of a solute i

Answer: in terms of the number of moles of solute dissolved in one cubic decimetre of solution

19 of 27

What is the unit for this?

Answer: moles per cubic decimetre OR mol/dm3

20 of 27

What is the formula for working out titrations?

Answer: M1 V1 / N1 = M2 V2 / N2

M= concentration, V= volume, N= number of moles

21 of 27

What were Lavoisier's ideas?

Answer: that part of the air was responsible for the behaviour of acids. He called this gas 'oxygen' from the Greek meaning 'acid-forming'

22 of 27

What did Sir Humphry Davy conclude after finding o

Answer: that hydrogen, rather than oxygen, is the important element in acids

23 of 27

Who first suggested the truly scientific definitio

Answer: Svante Arrhenius

24 of 27

What else did Arhenius suggest?

Answer: that when acids, bases and salts dissolve in water they separate either partly or completely into charged particles called ions. This is a process called dissociation. 

25 of 27

Another thing Arrhenius suggested?

Answer: that the similarities between acids were due to the hydrogen ions they produce when dissolved in water. This is the same for bases too

26 of 27

What did Lowry and Bronsted suggest?

Answer: that acids are proton donors and bases are proton acceptors

27 of 27


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »