C2H - Why Is Salt So Important Flashcards Preview

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Flashcards in C2H - Why Is Salt So Important Deck (15):
0

What is salts chemical name ?

Sodium chloride

1

How does pumping hot water play a role in the mining of salt ?

You pump hot water underground so therefore the salt dissolves and the salt solution is forced to the surface by the pressure of the water

2

What happens if we don't fill the holes after mining ?

Subsidence. The land would collapse

3

What is sodium chloride used as ?

Preservative
Flavouring
Used on roads

4

What are the three useful products of electrolysis ?

Hydrogen gas
Chlorine gas
Sodium hydroxide

5

Where is hydrogen gas given off ?

At the cathode

6

Where is chlorine gas given off ?

Anode

7

How is the sodium hydroxide formed ?

From the ions left in the solution

8

In terms of ions what happens at the cathode ?

Two hydrogen ions accept on electron each to become one hydrogen molecule

9

What's the equation for what happens at the cathode ?

2H+ + 2E- = H2

10

What happens in terms of ions at the anode ?

Two chloride ions loose an electron each to become one chlorine molecule

11

What's the equation for the stuff that happens at the anode ?

2Cl- - 2e- = Cl2

12

What is hydrogen gas used for ?

To make ammonia and margarine

13

What is the chlorine used for ?

To disinfect water or to make plastics

14

What's the sodium hydroxide used for ?

To make soap