Salta And Electrolysis Flashcards Preview

Chemistry C2 > Salta And Electrolysis > Flashcards

Flashcards in Salta And Electrolysis Deck (15):
1

what is a base?

an alkali that can neutralise acids.

2

to find the PH of something we can use what?

Universal indicator

3

a higher PH means what?

more alkali

4

what are the two ways of making a salt?

Acid + Metal ---> a salt + hydrogen
Acid + base ---> a salt + water

5

how can we make an insoluble salt?

adding two soluble salt solutions together and distilling the precipitate which is formed.

6

in electrolysis the metal is the positive ion and therefore goes to where?

the negative electrode.

7

in electrolysis what happens to the ions?

they become neutrally charged and are attracted to oppositely charged electrodes.

8

the effect of water usually means

if hydrogen is less reactive than the metal then it will be given off at the negative electrode.

9

how is aluminium extracted from aluminium oxide?

electrolysis

10

aluminium oxide is mixed with cryolite to do what?

lower it's melting point.

11

what forms at the negative and positive electrodes during aluminium extraction?

+ oxygen.
- aluminium

12

carbon atoms are replaced how?

regularly, they burn away.

13

carbon atoms are replaced how?

regularly, they burn away.

14

what three products does the electrolysis of brine make?

- chlorine (gas)
- hydrogen (gas)
- sodium hydroxide solution

15

during electroplating the item to be electroplated is found where?

the negative electrode.