Flashcards in C2H - Why Is Salt So Important Deck (15):
What is salts chemical name ?
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
What happens if we don't fill the holes after mining ?
Subsidence. The land would collapse
What is sodium chloride used as ?
Used on roads
What are the three useful products of electrolysis ?
Where is hydrogen gas given off ?
At the cathode
Where is chlorine gas given off ?
How is the sodium hydroxide formed ?
From the ions left in the solution
In terms of ions what happens at the cathode ?
Two hydrogen ions accept on electron each to become one hydrogen molecule
What's the equation for what happens at the cathode ?
2H+ + 2E- = H2
What happens in terms of ions at the anode ?
Two chloride ions loose an electron each to become one chlorine molecule
What's the equation for the stuff that happens at the anode ?
2Cl- - 2e- = Cl2
What is hydrogen gas used for ?
To make ammonia and margarine
What is the chlorine used for ?
To disinfect water or to make plastics